JPS5963932A - Charging electric device - 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 The present invention is similar to an electric device having a charger with AC operation. The output power 79 values are mutually exclusive, and 100■ and 2
As shown in 60■, different AC' power supplies can be used as input terminals, so it is a system that can be used for charging, charging, and electrical equipment.

Conventionally, in this type of rechargeable electrical equipment, the mode switching method described above is, for example, the oscillation Hj of the inverter circuit.
Has a method been devised to switch the one-three-point resistor of the transistor in conjunction with the Tanabata drive switch?・JnJ
"ljf Just changing the resistance value of the X-mitter resistor,
Even if the circuit constants are adjusted to one e-F, the other e-F may oscillate at t/'i or become unstable.
In addition to the above-mentioned Mitsuta grinding pile, in order to improve the constant values of parts of 2 to 3 i4j or more, such as the turn ratio of the first to third turns of the oscillation transformer, the base capacitor Taniharu, and the resistance value of the base resistor. There was a problem in that cutting and planting 4- at the same time was difficult both technically and in terms of cost.

The present invention has been provided in view of the above-mentioned points.
To provide all rechargeable electrical appliances that can be made completely stable with both E-F chargers, but also stable for different AC power inputs such as 100V and 260V. t purpose.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a Kazuo embodiment of the present invention, in which the membrane protective circuit (
2) Enters the rectifier bridge Rec of the rectifier circuit (3) through the resistor R1. Connect the primary winding L1 of the oscillation transformer from the class side output of the rectifier bridge Rec,
Transistor Tr1 for oscillation of the switch circuit (4)
After passing through the resistor Raf and the battery Bk, it returns to the negative side of the rectifier Rec. Also C
8 is a capacitor for smoothing and noise removal, and R2 is a resistor for reducing the base current of the transistor Tr1. Capacitor C! , the secondary 4-wire oscillation transformer, and the resistor R3 actuate the startup acceleration circuit (5) of the transistor 'l''rl, and this startup acceleration circuit (5) is equipped with a shot diode, which is the key point of the present invention. The two emitter resistors RBlT and RKm and the VJ switching switch SW, which also serves as the motor M switching switch, constitute the three-way resistor switching circuit (6).Oscillation transformer The three circuits a, (output winding) L3 and the rectifier diode Do are an output circuit (7) that supplies a charging current to the battery B or a motor current/lk to the motor M.The above changeover switch SW Turn on 3 when using with AC operation.
The capacitor C3 and the resistor R1 are connected to the high voltage generated in the primary winding L1 of the transformer.
It consists of an cum absorption circuit (8) that absorbs cum. Note that the capacitor C2 and resistor R1 described above constitute the Hirayui circuit (9) and the starting circuit 1111j, respectively.

The production of the above-mentioned unexampled product will be explained below.

Now passes through the fuse resistor R1 and goes to the cocurrent bridge i<ec
.

The input voltage from the power supply 11 is rectified by the ridge R.
Full wave planned in ec nl first resistance R2, 2nd @ spelling! ,
A pace current for starting the transistor Tr1 flows through the resistor R3. This current causes the transistor Tr
Start turning off. Therefore, due to the collector current of the L resistor Tr1, the secondary winding L2 undergoes a transformer action in the direction in which the transistor 1' is turned on (in the base direction, current = si direction). As a result, the transistor Tr1 is suddenly turned on. After that, when the transistor Tr1 is saturated and the collector current no longer increases, a voltage is generated in the primary winding L1 of the oscillation transformer in the direction of increasing the current ak, and therefore the secondary @
'flA L! Since a voltage is generated in the direction of decreasing the base current, the transistor Trl is abruptly cut off. Then, from the point when the collector current stops flowing, the transistor Trl
starts to turn on suddenly. In this way, the magnetic energy accumulated by the primary wire L1 is released from the tertiary winding L3 during the off period of the transistor Tr, and is left behind by the diode DO, resulting in an output current. .

The emitter resistance CRg &-'& RED) of the transistor Trl has the function of suppressing the variation t of hfe of the transistor Trl,'! In addition, since the lid ALC (primary current) can be controlled, the VJ switch SW, which also serves as a Tanabata driver, can be used to reduce the power consumption during charging and when the switch is connected. It's like a mortar. When the battery is fully charged, the changeover switch SW is turned off, so the total resistance of the transistor Trl is determined only by the emitter resistance R1. Therefore, one three-point resistance of the resistor Tr1 is 1.
Three-piece resistor RF, , and RFJ resistor 4″ARB, 1
・Rs/(REI +RB2). Then, by appropriately setting the negative values of the three-point resistors RH+ and RE, n vc = electrically controlled output current can be obtained during charging and AC chaining, respectively.

Next, the production of I) 1-, which is the main point of the present invention, will be explained.

Figure 2 shows f! 31 diagram circuit time 1000? - is shown in purple, resistor R2 and capacitor C! The connection point is aQ, the cathode k b of the diode D1, 61, the a)-de f
When taken as point c, (a) in Figure 2 is the transistor 'rr
The collector current 1c waveform of l, (C1) is the collector current 1c waveform of l.
I E ”) evening'441fVCB; *form, (l'X
) is the output 'm 1fL 1 o wave je, (Y is the voltage ratio waveform between points a and C, (e) is the voltage waveform between b and c points 11 when it is hot, (The graph shows the b-c voltage ratio waveforms when the diode D175 is discharged.) Now, when the transistors Tr, OFF, ηλ, etc. of the Sui-Sochinji circuit (4) are turned on. When considering Vt when the transistor Trl is off, the base potential is initially reverse biased, and as the resistor R2 discharges from the base to the capacitor C2, the base potential gradually rises. The distance between the base and emitter of the Trl is now in one direction.
The transistor Tr1 suddenly starts to turn on from the moment when the discharge of magnetic energy A from the secondary winding L3 ends, so that the base potential of the secondary winding L! As a result of this effect, the angle suddenly moves in the positive direction as shown in FIG. 2 (e).

However, at this time, if the circuit constants (C, R, L values) of the base circuit are not appropriate, even if the discharge of magnetic energy from the tertiary winding L3 ends, the discharge to the capacitor C2 will continue. In many cases, the forward bias between the base of the transistor Tr1 and the 1st terminal cannot be completed, and the transistor Tr is not turned on normally.Especially,
Two types of ℃-do-t with different output type m values: charging and AC operation
However, when using the circuit with both a low input voltage of about 100 V and a high voltage of about 260 V, it was difficult and problematic to determine the circuit constants that would be sufficient for all seven nodes. .

Therefore, in the present invention, in the startup acceleration circuit (5) of the transistor Trl, the base of the transistor Trl is
A Schott diode D1 is connected in parallel to a series circuit consisting of a three-way diode and an emitter resistance 1 < El.The operation when this Schott diode D1 is connected is shown in Fig. 1. Transistor 'rr
If the potential of the base of D1 is positive, that is, when the transistor Tr1 is on 1υ, the diode D1 will not be reverse biased during this shot. Next, consider a case where the transistor Tr1 is off, that is, the base of the transistor Tr□ is negatively biased. At this time, the negative bias 11μ of the base of the transistor Tr10 is the battery B.
The voltage of the diode D1 is VF(0,3
~0.4). Therefore, by attaching this Schottian diode 01, the base circuit constant of the transistor 'rr1 is slightly unbalanced, and the switching operation from OFF to ON will be performed smoothly, and the oscillation will be controlled. This means that it will be stable even in the mode.

As mentioned above, in the present invention, a Schott diode is connected between the base terminals of the transistor in the startup acceleration circuit of the inverter circuit, so if the base circuit constant of the transistor is slightly unbalanced, Stable oscillation operation of the inverter circuit cannot be obtained even in
Therefore, when performing t-mode switching during charging and AC operation, or even when switching the source voltage to high or low, stable operation can be obtained in each mode. It has the following.

[Brief explanation of the drawing]

Figure %1 is the circuit diagram of the present invention-Ten embodiment, Figure 2 is the same as the above time chisade, -D1 is the Schott expert Taito, (5
) is a startup acceleration circuit. Agent Patent Attorney Choshichi Rode

Claims (1)

[Claims] +1) The changeover switch that switches between charging and AC operation has been changed so that the battery is charged with the output current when the light is on, and the full load is directly driven during AC operation with an output current that is different from that during charging. In a rechargeable electrical device equipped with an inverter circuit, a Schott diode is connected between the base and emitter of the transistor in the startup acceleration circuit connected to the base of the transistor for oscillation in the inverter circuit. A rechargeable electrical device characterized by being connected.