US 11,353,340 B2 · Motor rotation angle measurement device and method

Abstract

Provided are a motor rotation angle measurement device and method. The device may comprise: a signal conditioning circuit, configured to receive a three-phase output voltage of a motor and separately generate three square-wave signals; and a processor, configured to generate a six-multiplying frequency pulse whenever jumping of any one of the three square-wave signals, is detected in a rotation period of a motor, generate compensation pulses between the current six-multiplying frequency pulse and a next six-multiplying frequency pulse based on a time interval between the current six-multiplying frequency pulse and a previous six-multiplying frequency pulse and a preset compensation subdivision coefficient k, and accumulate the number of the compensation pulses, wherein the number of the compensation pulses is related to the rotation angle of the motor.

Claims19

Dependent claims

An electric machine rotation angle measurement device, comprising:

a signal conditioning circuit, configured to receive three-phase output voltages UA, UB and UC of an electric machine, and generate a first square wave signal corresponding to UA-UB, a second square wave signal corresponding to UB-UC, and a third square wave signal corresponding to UC-UA respectively;
and
a processor, configured to generate a six-fold frequency pulse whenever a jump of any one of the first square wave signal, the second square wave signal, and the third square wave signal is detected during a rotation period of the electric machine, generate compensating pulses between a current six-fold frequency pulse and a next six-fold frequency pulse based on a time interval between the current six-fold frequency pulse and a previous six-fold frequency pulse and a preset compensating subdivision coefficient k, and accumulate a number of the compensating pulses, wherein the number of the compensating pulses is related to a rotation angle of the electric machine.

An electric machine rotation angle measurement method, comprising:

generating a six-fold frequency pulse whenever a jump of any one of a first square wave signal, a second square wave signal, and a third square wave signal is detected during a rotation period of an electric machine,
generating compensating pulses between a current six-fold frequency pulse and a next six-fold frequency pulse based on a time interval between the current six-fold frequency pulse and a previous six-fold frequency pulse and a preset compensating subdivision coefficient k, and
accumulating a number of the compensating pulses, the number of the compensating pulses being related to a rotation angle of the electric machine,
wherein, the first square wave signal corresponds to a difference UA-UB between UA and UB among three-phase output voltages UA, UB and UC of the electric machine, the second square wave signal corresponds to a difference UB-UC between UB and UC among the three-phase output voltages UA, UB and UC of the electric machine, and the third square wave signal corresponds to a difference UC-UA between UC and UA among the three-phase output voltages UA, UB and UC of the electric machine.

1 more element

Dependencies are inferred from the claim text.

Motor rotation angle measurement device and method

Life of this patent

Motor rotation angle measurement device and method

Life of this patent

Abstract

Claims19