Electric vehicle software and hardware decoding redundant circuit and switching method

Abstract

The invention relates to an electric vehicle driving permanent magnet synchronous motor control technology and particularly relates to an electric vehicle software and hardware decoding redundant circuit, which comprises a motor controller main control chip DSP, a sinusoidal signal conversion circuit, a rotary transformer decoding chip, a logic control circuit, a software and hardware decoding switching relay control circuit, an excitation signal processing circuit, a rotary transformer and a feedback signal switching and processing circuit. The motor controller main control chip DSP is respectively connected with the sinusoidal signal conversion circuit, the rotary transformer decoding chip, the logic control circuit and the feedback signal switching and processing circuit; the rotary transformer decoding chip is respectively connected with the logic control circuit, the software and hardware decoding switching relay control circuit and the feedback signal switching and processing circuit; the software and hardware decoding switching relay control circuit is connected with the excitation signal processing circuit; the excitation signal processing circuit is connected with the rotary transformer; and the rotary transformer is connected with the feedback signal switching and processing circuit. The circuit is rapid in fault detection switching, simple in circuit and low in cost.

Description

technical field [0001] The invention belongs to the technical field of electric vehicle drive permanent magnet synchronous motor control, and in particular relates to an electric vehicle software and hardware decoding redundant circuit and a switching method. Background technique [0002] The traditional electric vehicle controller obtains the angle information of the permanent magnet synchronous motor by using the resolver decoder chip to output the excitation signal to the primary winding of the resolver through the signal processing circuit, and then feeds back the sine and cosine signals (orthogonal differential signal) to solve the angle value, and transmit the data to the DSP through SPI or A, B, NM to realize the expected function of the system. When the decoding chip fails, the angle transmitted to the DSP is an unexpected value, which will cause the system (motor Controller) has an unexpected output, which may eventually cause damage to the system (motor controller)...

AI Technical Summary

Problems solved by technology

[0002] The traditional electric vehicle controller obtains the angle information of the permanent magnet synchronous motor by using the resolver decoder chip to output the excitation signal to the primary winding of the resolver through the signal processing circuit, and then feeds back the sine and cosine signals (orthogonal differential signal) to solve the angle value, and transmit the data to the DSP through SPI or A, B, NM to realize the expected function of the system. When the decoding chip fails, the angle transmitted to the DSP is an unexpected value, which will cause the system (motor Controller) has an unexpected output, which may eventually cause damage to the system (motor controller) and may even cause the vehicle to lose control and cause injury to the driver

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