Electric vehicle software and hardware decoding redundant circuit and switching method
A redundant circuit, software and hardware technology, which is applied in the direction of hardware redundancy for data error detection, electrical components, motor control, etc., can solve the problems of system damage, driver injury, vehicle out of control, etc., and achieve low cost, The effect of fast switching process and simple circuit
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[0012] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0013] This embodiment provides a redundant software and hardware decoding circuit for the electric vehicle controller to detect the angle of the permanent magnet synchronous motor. Both the resolver decoding chip AD2S1210SDZ and the Flex_PWM module of the DSP can provide excitation signals for the primary side winding of the resolver through the excitation circuit. And the feedback signal (orthogonal differential signal) output by the sine and cosine windings of the resolver is calculated through the signal processing circuit and the resolver decoding chip to calculate the angle and then pass SPI or transmit it to CPUDSP (called hardware decoding); the ADC module of CPUDSP can extract The envelope curve of the response signal of the sine and cosine winding is obtained. The angle of the envelope curve is obtained through the resolver software decoding a...
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