A detection device and a detection method for a zero-position initial angle of a resolver of a permanent magnet synchronous motor
A technology of permanent magnet synchronous motor and detection device, which is applied in motor control, electronic commutation motor control, electrical components, etc., can solve problems such as increasing workload and reducing production efficiency.
Active Publication Date: 2018-12-18
浙江台运汽车科技有限公司
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Problems solved by technology
The existing resolver zero position detection method generally requires the use of instruments to calibrate the resolver zero position when installing the resolver sensor. This method increases the workload and reduces production efficiency.
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[0048] The embodiment of the present invention provides a detection device and detection method for the initial angle of the zero position of the permanent magnet synchronous motor. The detection device and the detection method are based on the principle that when the three-phase permanent magnet synchronous The stator three-phase winding of the magnetic synchronous motor must induce a three-phase AC voltage (induced back electromotive force). At this time, the stator current is 0, and the measured stator port voltage is the induced electromotive force; Phase voltage vector u s Leading rotor flux vector ψ f 90°, such as figure 1 Shown; when the permanent magnet synchronous motor reverses, the stator phase voltage vector u s Lag rotor flux vector ψ f 90°, such as figure 2 shown. image 3 Shown is the initial angle θ of the resolver zero position when the permanent magnet synchronous motor is rotating forward 0 vector diagram of , and which is: Among them, the rota...
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The invention provides a detection device and a detection method for a zero-position initial angle of a resolver of a permanent magnet synchronous motor, A t device comprises: first hardware circuit,second hardware circuit, a resolver angle decoder and a zero bit angle detector, the first hardware circuit samples the induced back electromotive force of the motor stator, The second hardware circuit samples the resolver of the resolver sensor, and the resolver angle decoder calculates the resolver angle according to the resolver and inputs the zero position angle detector, and the zero positionangle detector calculates the zero position initial angle according to the induced back electromotive force and the resolver angle of the stator of the motor and outputs the zero position initial angle of the resolver. The initial angle of magnetic pole can be detected automatically without additional peripheral circuits. The method is simple and reliable, and it is less dependent on the parameters of permanent magnet synchronous motor (PMSM) and the fluctuation of rotational speed in the experimental environment. The controller automatically stores this angle into the EEPROM, which can be saved even after power is off. The automation degree is high, precision meets the control requirements and quite high stability is acehived.
Description
technical field [0001] The invention relates to the technical field of permanent magnet synchronous motors, in particular to a detection device and a detection method for the zero initial angle of a permanent magnet synchronous motor resolver. Background technique [0002] Permanent magnet synchronous motors have high efficiency and high power density, and are the mainstream drive motors for electric vehicles. High-quality control of permanent magnet synchronous motors requires accurate detection of the rotor electrical angle. The resolver is referred to as a resolver. It is an angle sensor. It has the advantages of resistance to harsh environments, vibration resistance, high reliability, and high precision. It has been more and more widely used. The permanent magnet synchronous motor drive scheme using a resolver as an angle sensor It is the mainstream solution for electric vehicle drive at present. [0003] Resolver sensors are installed on the motor rotors of new energy...
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IPC IPC(8): H02P6/182
CPCH02P6/182H02P2203/03
Inventor 王六闰马宇杨啸风孟路朋
Owner 浙江台运汽车科技有限公司