Method, system and device for testing magnetic pole code of permanent magnetic synchronous tractor
A permanent magnet synchronous and traction machine technology, which is applied to measuring devices, measuring electrical variables, instruments, etc., can solve the problems of complicated test accuracy of magnetic pole codes and difficult debugging
Active Publication Date: 2014-02-05
HITACHI ELEVATOR CHINA
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[0007] Based on this, it is necessary to provide a permanent magnet synchronous traction machine magnetic pole code testing method, system and device with a simple principle, convenient debugging and adjustable test accuracy for the existing problems of low magnetic pole code test accuracy and complex process debugging.
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[0029] Such as figure 1 As shown, a permanent magnet synchronous traction machine magnetic pole code testing method, including steps:
[0030] Step S110, when the brake is released, output a square wave signal with the same phase as the UV line potential to the drive device of the traction machine in real time by controlling the phase detection device;
[0031]Step S120, by controlling the driving device of the traction machine to count the pulses of the periodic change signal output by the rotary encoder in real time, obtain the Z-phase signal pulse of the rotary encoder, and determine the periodic change signal at the time when the square wave signal crosses zero to the number of pulses between the Z-phase signals of the rotary encoder;
[0032] Step S130, determining the number of pulses in half a cycle of the cycle-varying signal;
[0033] Step S140, when the counterweight side is heavier than the car side, if the Z-phase signal occurs in the positive half cycle of the s...
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The invention discloses a method, system and device for testing a magnetic pole code of a permanent magnetic synchronous tractor. Polarity detection and zero-cross detection are conducted on counter electromotive force generated by the permanent magnetic synchronous tractor, so that square signals with a phase identical to that of UV wire potential are output to a tractor driving device in real time. The square signals are combined with angle information given by a rotary encoder so that the phase passing through the counter electromotive force can be calculated in real time. The phase of the counter electromotive force of the tractor is recorded when Z-phase signals of the rotary encoder are changed, so that the corresponding relation between a tractor rotor and a rotary encoder code wheel is determined, namely, the magnetic pole code is determined. The magnetic code testing accuracy is adjusted and controlled through the number of pulses output by period change signals in a period, and therefore the method is suitable for different permanent magnetic synchronous tractors. When the magnetic pole code of the permanent magnetic synchronous tractor is high in accuracy, the starting current quota needed by the permanent magnetic synchronous tractor is relatively small, the requirements for mechanical materials and the electrical capacity are relative low, and the cost of the permanent magnetic tractor and the tractor driving device is saved.
Description
technical field [0001] The invention relates to the field of electrical control, in particular to a method, system and device for testing a magnetic pole code of a permanent magnet synchronous traction machine. Background technique [0002] The magnetic pole code is the data describing the relative position relationship between the rotor of the synchronous motor and the code disc of the rotary encoder. When the rotary encoder is installed on the motor shaft, the starting point of the coordinate describing the angle cannot coincide with the motor rotor, and there is always an angle difference. In the control of synchronous motors, the position of the rotor must be known, and the control system can only obtain the rotor angle through the signal of the rotary encoder, so it is necessary to know the relative position relationship between the rotary encoder and the motor rotor, that is, the above angle, that is Magnetic pole code. The higher the accuracy of the magnetic pole co...
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IPC IPC(8): G01R25/08
Inventor 张文俊郭威杜永聪郭志海
Owner HITACHI ELEVATOR CHINA