Resolver excitation driving device, motor rotor position analysis device and automobile steering system

Abstract

In order to solve the technical problems in the prior art, the invention provides a resolver excitation driving device, a motor rotor position analysis device and an automobile steering system, and the driving cost of a resolver excitation coil is reduced. The resolver excitation driving device is used for being connected with the resolver excitation coil and comprises a first processor, a low-pass filter and a resonator. The output end of the first processor is coupled with the input end of the low-pass filter, and the output end of the low-pass filter is coupled with the input end of the resonator; the output end of the resonator is used for being coupled with the input end of the resolver exciting coil; the first processor is used for outputting an SPWM signal; the low-pass filter is used for filtering the SPWM signal output by the first processor into a sine wave signal; and the resonator is used for generating a signal for exciting the resolver excitation coil according to the sine wave signal formed after filtering of the low-pass filter. According to the device, the resolver excitation coil can be driven without a complex circuit, and the driving cost of the resolver excitation coil is effectively reduced.

Description

technical field [0001] The disclosure relates to the field of automobile steering control, in particular to a resolver excitation drive device, a motor rotor position analysis device and an automobile steering system. Background technique [0002] The electric steering system is composed of steering gear, pipe column and other mechanical components, electric control, sensor and motor. Among them, the motor position sensor can use many types, magnetoresistance effect type, Hall type and resolver type. Among them, the resolver has the advantages of high reliability and strong anti-interference ability, but its application is limited due to the complexity of the interface circuit and high cost, and the excitation part of the interface circuit of the resolver occupies the main part. At present, the steering controller in the industry uses a resolver as a motor position sensor, and uses a push-pull howland constant current source circuit to drive the resolver excitation coil. Th...

AI Technical Summary

Problems solved by technology

Among them, the resolver has the advantages of high reliability and strong anti-interference ability, but its application is limited due to the complex interface circuit and high cost, and the excitation part of the resolver interface circuit occupies the main part

Now the steering controller in the industry uses a resolver as a motor position sensor, and uses a push-pull howland constant current source circuit to drive the resolver excitation coil, the circuit is complicated and the cost is high

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