JPH0361575U

JPH0361575U -

Info

Publication number: JPH0361575U
Application number: JP12317389U
Authority: JP
Priority date: 1989-10-23
Filing date: 1989-10-23
Publication date: 1991-06-17
Anticipated expiration: 2004-10-23
Also published as: JPH0725698Y2

Description

[Brief explanation of the drawing]

第１図は本考案の回転機の速度検出装置の一実
施例を示す構成図、第２図は回転位置の変化値と
回転角、速度の関係を示す特性図、第３図は本考
案の他の実施例を示す構成図、第４図は従来の回
転機の速度検出装置を示す構成図、第５図は回転
位置と回転方向の関係を示す説明図である。１……レゾルバ、２……Ｒ／Ｄ変換器、４……
パルス式回転検出器、２１……励磁位相発生器、
２２……励磁回路、２３……ＰＬＬ回路、２４…
…ラツチ回路、３０……速度演算器、３１……位
置データ記憶回路、３２……減算器、３３……タ
イミング設定器、３４……係数回路、３５……計
数タイミング設定器、３６……パルス計数回路、
３７……回転方向検出器、３８……補正信号発生
器、３９……加算器。 Fig. 1 is a configuration diagram showing one embodiment of the speed detection device for a rotating machine of the present invention, Fig. 2 is a characteristic diagram showing the relationship between the change value of the rotational position, the rotation angle, and the speed, and Fig. 3 is a diagram showing the relationship between the change value of the rotational position, the rotation angle, and the speed. FIG. 4 is a configuration diagram showing another embodiment, FIG. 4 is a configuration diagram showing a conventional speed detection device for a rotating machine, and FIG. 5 is an explanatory diagram showing the relationship between rotational position and rotation direction. 1... Resolver, 2... R/D converter, 4...
Pulse type rotation detector, 21... excitation phase generator,
22... Excitation circuit, 23... PLL circuit, 24...
... Latch circuit, 30 ... Speed calculator, 31 ... Position data storage circuit, 32 ... Subtractor, 33 ... Timing setter, 34 ... Coefficient circuit, 35 ... Counting timing setter, 36 ... Pulse counting circuit,
37...Rotation direction detector, 38...Correction signal generator, 39...Adder.

Claims

[Scope of utility model registration request]

A resolver directly connected to the rotating machine, an excitation phase generator that generates an excitation phase of an AC excitation signal to excite the resolver, and an excitation phase generator that outputs an AC excitation signal that excites the excitation winding of the resolver from this excitation phase. a PLL circuit that detects the phase of the AC detection signal output from the detection winding of the resolver as a digital phase signal; and a PLL circuit that latches the digital phase signal at a predetermined phase of the AC excitation signal that excites the resolver to generate a rotational position signal. an R/D converter consisting of a latch circuit that obtains the rotation, a pulse type rotation detector connected to the rotating machine and generating a two-phase pulse signal synchronized with the rotation, and a rotation direction signal from the signal of the pulse type rotation detector. It consists of a rotational direction detector for detecting, and a speed calculator for calculating the speed from the rotational position detection signal, the two-phase pulse signal and the rotational direction signal,
This speed calculator calculates the speed from the number of pulses of the two-phase pulse signal and the rotational direction signal in a predetermined first time interval, and also calculates the change value of the rotational position signal in a predetermined second time interval. With,
It is determined whether the rotation angle in the second time interval from the first speed is a half rotation or more, and if the rotation angle is half a rotation or more, a phase correction signal corresponding to the rotation speed and rotation direction is outputted to the change value of the rotation position signal. What is claimed is: 1. A speed detection device for a rotating machine, characterized in that the speed detection device for a rotating machine is configured to calculate a second speed from the rotation angle signal by adding the rotation angle signal to the rotation angle signal.