JPH0442701A - Faulty point detector for linear motor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Purpose of the Invention (Industrial Application Field) The present invention provides a method for determining which propulsion coil has failed when a failure such as a short circuit or ground fault occurs in the propulsion coil of a linear motor. The present invention relates to a fault position detection device for a linear motor that detects fault position of a linear motor.

(Prior art) Generally, the propulsion coil of a linear motor generates propulsive force between it and a superconducting magnet mounted on the linear motor car. If a malfunction such as a short circuit or ground fault occurs in the coil, it will hinder the running of the linear motor car, so it is necessary to detect the malfunctioning propulsion coil.

FIG. 2 is a diagram showing a conventional example for detecting a failure position of a linear motor, in which each propulsion coil LMI is arranged in series along a track (not shown).

LM2. LM3. LM4. -, LM2n-1, LM2n
The coil classification switches SSI, SS2°SS3. S
S4. =-, 5S2n-1, 5S2n are connected. These coil classification switches SS1 to 5S2n are sequentially turned on by a control device (not shown) according to the running position of the linear motor car LMC, and are coil classification switches SSI.

S S 3. -, SS2n-1 is connected to the A-system power converter 5S-A via the A-system power supply line LA, and the coil classification switch SS2. SS4. −． 5S2n is connected to each of the B power converters 5S-B via a B-system power supply line LB.

The A-system power converter fSS-A and the B-system power converter S S-B are the propulsion coils LMI to LM2nl: electric power (
It supplies three-phase alternating current) and is composed of semiconductor switches such as thyristors.

In addition, each of the above propulsion coils LMI, LM2°LM3. LM
4. -, LM2n-1, and current transformers CTI, CT2. CT3. CT4゜,... CT2
n-1, CT 2n are provided. Overcurrent detectors RYI and R are installed on the secondary side of these current transformers CTI to CT2n.
Y2. RY3. RY4. ...RY 2n-1,RY
2n are connected, and these overcurrent detectors RYI~
The overcurrent flowing through the current transformers CT1 to CT2n is detected by RY2n.

In addition, the overcurrent detectors RYI to RYLn are current transformers CT
When an overcurrent flows through I-CT2n, an overcurrent detection signal is sent out, and these overcurrent detectors RYI~
The overcurrent detection signal sent from RY2n is input to the failure detection display device ANN.

In the above configuration, the coil classification switch SSI
, SS2. SS3. SS4. ...S S 2n-1,
When S S 2n is turned on, A system power converter 5S-A
Or from the power converter 5S-B to the propulsion coil LMI
~ Power is supplied to LM2n, and the linear motor car LMC
A propulsive force is generated between the superconducting magnet (not shown) mounted on the At this time, for example, if a short circuit or ground fault occurs in the propulsion coil LM3, an overcurrent will flow through the current transformer CT3, so this is detected by the overcurrent detector RY3, and an overcurrent detection signal is sent from the overcurrent detector RY3. Accordingly, the occurrence of a short circuit or ground fault in the propulsion coil LM3 can be detected by the failure detection display device ANN.

(Problem to be Solved by the Invention) By the way, in the conventional device as described above, a current transformer is provided corresponding to the propulsion coil, and an overcurrent detector detects the overcurrent flowing through these current transformers to control the linear motor. Since the location of the fault was detected, a current transformer and an overcurrent detector were required for each propulsion coil, leading to problems such as increased costs.

The present invention was made in view of these problems, and
The purpose of this invention is to provide a failure position detection device for a linear motor that can detect a failed propulsion coil at low cost without requiring a current transformer and an overcurrent detector for each propulsion coil.

[Configuration of the Invention (Means for Solving the Problems) In order to solve the above problems, the first invention provides a plurality of propulsion coils that supply electric power to a plurality of propulsion coils laid on a track via a coil division switch. a power supply system, a current transformer provided on the power supply line of each of these power supply systems, an overcurrent detector that detects an overcurrent flowing through the current transformer, and a running position of a linear motor vehicle running on the track. a propulsion coil failure detection unit that detects a propulsion coil in which a failure has occurred by inputting a running position detection signal from the running position detection unit and an overcurrent detection signal from the overcurrent detector; It is equipped with means.

Further, the second invention provides a plurality of power supply systems that supply power to a plurality of propulsion coils laid on a track via coil classification switches, and a current transformer provided on the power supply line of each of these power supply systems. , an overcurrent detector for detecting an overcurrent flowing through the current transformer, a running position detection means for detecting the running position of the linear motor vehicle running on the track, and a running position detection signal from the running position detection means. a propulsion coil failure detection means for detecting a propulsion coil in which a failure has occurred by inputting the overcurrent detection signal from the overcurrent detector; The system is equipped with a power supply system detection means for detecting whether the power supply system belongs to the power supply system, and a power supply system protection means for controlling the output power of the power supply system detected by the power supply system detection means to prevent an increase in the load on the power supply system.

(Function) In the present invention, by logically detecting the fault position of the propulsion coil based on the fault signal from the overcurrent detector and the position signal from the travel position detection means, the current transformer and overflow are detected for each propulsion coil. The failure position of the propulsion coil can be detected without providing a current detector.

(Example) An embodiment of the present invention will be described below with reference to FIG.

FIG. 1 is a diagram showing a circuit configuration for detecting a failure position of a linear motor, in which propulsion coils LMI are arranged in series along a track (not shown).

LM2. LM3. LM4. -, LM2n-1, LM2n
includes a coil classification switch SS1. SS2゜SS S3
．． S S4. -, S 52n-1, S S2n
is connected.

These coil classification switches SS1 to 552n are sequentially turned on according to the running position of the linear motor car LMC by a control device (not shown), and the coil classification switches SSI, SS3°..., 5S2n-1 are set to A.
The A-system power converter 5S-A is connected to the coil classification switch SS2 through the system power supply line LA. SS4. −． B power converters 5S-B are respectively connected to 5S2n via B-system power supply lines LB.

The A-system power converter 5S-A and the B-system power converter 5S-B supply power (three-phase alternating current) to the propulsion coils LMI to LM2n, and are composed of semiconductor switches such as thyristors.

A current transformer CTA is provided on the output side of the A-system power converter 5S-A and the B-system power converter 5S-B.

CTB is provided and these current transformers CTA.

The CTB detects the magnitude of the three-phase alternating current output from the A-system power converter 5S-A and the B-system power converter 5S-B. And the current transformer CTA,
Overcurrent detectors RYA and RYB are connected to the secondary side of CTB, and these overcurrent detectors RYA and RYB form a current transformer CTA.

It detects overcurrent flowing through the CTB and sends out an overcurrent detection signal.

The overcurrent detection signal sent from the overcurrent detector RYA is output from the AND circuits AI, A3. ..., the overcurrent detection signal input to one input terminal of A2n"l and sent out from the overcurrent detector RYB is sent to the AND circuit A2.A4..
..., is input to one input terminal of A2n. These AND circuits AI, A2. A3. A4.
-, A2n-1, A2n logically detect a failed propulsion coil, and AND circuits AI, A2. A3.
A4. -, A2n-1° A signal from the traveling position detection device PD is input to the other input terminal of A2n.

The traveling position detection device PD detects the traveling position of the linear motor car LMC.
AND circuits A1 to A each time a position signal from C is input.
It is composed of a shift counter and the like that outputs a traveling position detection signal to 2n. Note that the AND circuit AI, A2. A3.
A4. -, A2n-1゜The output terminal of A2n is connected to the input terminal of the failure position detection and display device ANN, and this failure position detection and display device ANN detects which propulsion coil has failed. There is.

Furthermore, the AND circuits A 1 , A 3 . -, A2
The input terminal of the OR circuit ORI is connected to the output terminal of the AND circuit A2.n-1. A4. ..., the input terminal of the OR circuit OR2 is connected to the output terminal of A2n. These OR circuits ORI and OR2 are propulsion coils LMI~L
The AND circuits AI, A2. A3. A4. −
, A2n-1, and A2n, a signal for narrowing down the gate phase is sent to the A-system power converter 5S-A or the B-system power converter 5S-B.

In such a configuration, the propulsion coil LMI.

LM2. LM3. LM4. -, LM2n-1, LM2n
Coil classification switch SSI provided correspondingly.

SS2. SS3. SS4. −． 5S2n-1, 5S2n
are sequentially supplied, and the propulsion coil LMI is transferred from the A-system power converter 5S-A and the B-system power converter 5S-B.

LM2. LM3. LM4. -, LM2n-1, LM2n
When a three-phase alternating current is supplied to the linear motor car LMC to run the linear motor car LMC, a position signal indicating the running position of the linear motor car LMC is output from the running position detection device PD, and the AND circuit A1.
A2. A3゜A4. -, A2n-1, input to A2n. At this time, for example, if a short circuit or a ground fault occurs in the propulsion coil LM3, the excitation current supplied from the A-system power converter 5S-A to the propulsion coil LM3 increases, and the load side of the A-system power converter 5S-A increases. Current transformer CT installed in
Overcurrent flows through A. Therefore, this is the overcurrent detector RY
Detected by A, and from overcurrent detector RYA to AND circuit AI,
A3.・When a failure signal is sent to A2n-1, the failure signal from the overcurrent detector RYA and the position signal from the traveling position detection device PD are input to the AND circuit 3, so the AND circuit A3 is Only the output becomes “1”,
The failure position detection and display device ANN can detect which propulsion coil has failed.

Therefore, in this embodiment, it is possible to detect which propulsion coil has failed without providing a current transformer and an overcurrent detector for each propulsion coil, and it is possible to reduce costs. Furthermore, in this embodiment, the AND circuit A1. A2. A3
．． A4. -, A2n-1゜The output from A2n is input to the OR circuits ORI and OR2, and the output signals from the OR circuits ORI and OR2 indicate whether the failed propulsion coil belongs to the A-system power converter 5S-A or the B-series power converter. Since the gate phase of 5S-B is narrowed down, the power converter can be protected.

Although the above embodiment describes a case where the linear motor is applied to a linear motor having two power supply systems, A system and B system, the present invention is not limited to this, and can be applied to a linear motor having three or more power supply systems. Of course, the present invention can also be applied to other linear motors.

[Effects of the Invention] As explained above, the first present invention provides a plurality of power supply systems that supply power to a plurality of propulsion coils laid on a track via fill section switches, and each of these power supply systems. a current transformer provided on the power supply line; a filtering current detector that detects an overcurrent flowing through the current transformer; and a running position detection means that detects the running position of the linear motor vehicle running on the track. , further comprising propulsion coil failure detection means for detecting a propulsion coil in which a failure has occurred by inputting the traveling position detection signal from the traveling position detection means and the overcurrent detection signal from the overcurrent detector. . Therefore, the failure position of the propulsion coil can be detected without providing a current transformer and an overcurrent detector for each propulsion coil, and costs can be reduced.

Further, the second invention provides a plurality of power supply systems that supply power to a plurality of propulsion coils laid on a track via coil classification switches, and a current transformer provided on the power supply line of each of these power supply systems. , an overcurrent detector for detecting an overcurrent flowing through the current transformer, a running position detection means for detecting the running position of the linear motor vehicle running on the track, and a running position detection signal from the running position detection means. a propulsion coil failure detection means for detecting a propulsion coil in which a failure has occurred by inputting the overcurrent detection signal from the overcurrent detector; The system is equipped with a power supply system detection means for detecting whether the power supply system belongs to the power supply system, and a power supply system protection means for controlling the output power of the power supply system detected by the power supply system detection means to prevent an increase in the load on the power supply system. Therefore, the failure position of the propulsion coil can be detected without providing a current transformer and an overcurrent detector for each propulsion coil, and an increase in load on the power supply system due to a failure of the propulsion coil can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a fault position detection apparatus showing an embodiment of the present invention, and FIG. 2 is a block diagram of a conventional fault position detection apparatus. L M 1~L M2r+-propulsion coil, SS1~5S
2n...Coil classification switch, LA...A system power supply line, LB...B system power supply line, 5S-A...A system power converter, 5S-B...B system power converter, LMC...
Vehicle, CTA, CTB...Current transformer, RYA, RYB...
・・Overcurrent detector, A1~A2n・・AND circuit, P
D... Traveling position detection device, ORI, OR2... OR circuit. Applicant's agent Patent attorney Takehiko Suzue Figure 2

Claims (2)

[Claims] (1) A plurality of power supply systems that supply power to a plurality of propulsion coils laid on a track via coil classification switches, a current transformer installed in the power supply line of each of these power supply systems, and this current transformer. an overcurrent detector that detects an overcurrent flowing through the track, a traveling position detecting means for detecting the traveling position of the linear motor vehicle traveling on the track, a traveling position detection signal from the traveling position detecting means and the overcurrent detection. 1. A failure position detection device for a linear motor, comprising propulsion coil failure detection means for detecting a propulsion coil in which a failure has occurred by inputting an overcurrent detection signal from a linear motor. (2) A plurality of power supply systems that supply power to a plurality of propulsion coils laid on the track via coil classification switches, a current transformer installed in the power supply line of each of these power supply systems, and this current transformer. an overcurrent detector that detects an overcurrent flowing through the track, a traveling position detecting means for detecting the traveling position of the linear motor vehicle traveling on the track, a traveling position detection signal from the traveling position detecting means and the overcurrent detection. a propulsion coil failure detection means that detects a propulsion coil in which a failure has occurred by inputting an overcurrent detection signal from the device; and a propulsion coil failure detection means that detects to which power supply system the propulsion coil detected by the propulsion coil failure detection means belongs. A failure location of a linear motor characterized by comprising a power supply system detection means and a power supply system protection means that controls the output power of the power supply system detected by the power supply system detection means to prevent an increase in load on the power supply system. Detection device.