Permanent magnet synchronous motor resolver zero position calibration circuit

A permanent magnet synchronous motor, zero calibration technology, applied in motor control, electronic commutation motor control, electrical components and other directions, can solve the problem of inability to adapt to the influence of resolver angle deviation, inability to achieve real-time self-calibration learning, complex implementation, etc. problem, to achieve the effect of small footprint, prevention of zero position change of resolver, and low circuit cost

Inactive Publication Date: 2019-09-20
HEFEI JUYI POWER SYST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Compared with the present invention, the existing technical solution is relatively complicated to implement, and the cost is also high. It c

Method used

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  • Permanent magnet synchronous motor resolver zero position calibration circuit
  • Permanent magnet synchronous motor resolver zero position calibration circuit
  • Permanent magnet synchronous motor resolver zero position calibration circuit

Examples

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Example Embodiment

[0024] The principle of the present invention is to determine the current position of the rotor according to the size of the counter electromotive force, such as figure 1 As shown, when phase A descends to the zero point, the rotor is at the 0 degree position (the position of the D axis), when the B phase descends to the zero point, the rotor is at the position of 120 degrees, and when the C phase descends to the zero point, the rotor is at 240 degree position.

[0025] u a =-ωΨ f sin(ωt)

[0026] u b =-ωΨ f sin(ωt-2*π / 3)

[0027] u c =-ωΨ f sin(ωt-4*π / 3)

[0028] Utilizing the characteristics of AD2S1210 resolver decoding chip to update the position information at the falling edge of SAMPLE, the current rotor position is read through AD2S1210 resolver decoding chip when the counter electromotive force crosses zero, so as to obtain the resolver zero angle.

[0029] The specific implementation steps are as figure 2 Shown: First, a small torque is given to accelerate ...

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Abstract

The invention discloses a permanent magnet synchronous motor resolver zero position calibration circuit comprising three voltage dividing circuits for collecting three-phase output voltages Ua, Ub and Uc of a permanent magnet synchronous motor. The output ends of the three voltage dividing circuits are connected with the in-phase input ends of three comparators U1A, U1B and U5A. The inverting input ends of the three comparators are connected with a bus negative electrode. The comparator output voltages Ua' and Ub' through an exclusive OR gate and the comparator output voltage Uc' are exclusive OR again. The output voltages of the three comparators are connected with the NO pin of an alternative analog switch through a digital isolator after the exclusive OR logic output. The resolver sampling signal and the selection signal sent by the DSP are connected with the NC pin and the IN pin of the alternative analog switch. The COM pin of the alternative analog switch connects the output signal to the SAMPLE pin of a resolver decoding chip. Resolver zero position calibration can be quickly performed, the cost is low, the response is fast and the calibration accuracy is high, and the circuit can be directly transplanted to a PCB for real-time calibration and self-learning for the hybrid vehicle type.

Description

technical field [0001] The invention relates to a permanent magnet motor, in particular to a permanent magnet synchronous motor resolver zero calibration circuit. Background technique [0002] The existing resolver zero position calibration needs to place the motor and electronic control on the test bench, and the experimenter operates the upper computer and the bench, and continuously debugs to obtain the resolver zero position angle. The operation is complicated, time-consuming, and the accuracy is not high enough. High; use the dynamometer to drag the motor to a certain speed to collect the back electromotive force method, although the precision is high, but it relies on the dynamometer and other devices, and it is relatively complicated to implement. [0003] The closest public document to this patent solution is the patent "A Permanent Magnet Synchronous Motor Resolver Zero Position Calibration System and Calibration Method" (publication number: 109239635A), which mainl...

Claims

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Application Information

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IPC IPC(8): H02P6/16H02P6/182
CPCH02P6/16H02P6/182H02P2203/05
Inventor 刘蕾徐文祥周政苑红伟张红玉
Owner HEFEI JUYI POWER SYST CO LTD
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