Evaluation of resolver sensor signals

Abstract

Circuit (2) for evaluating resolver sensor signals (28) in a vehicle, having a resolver sensor (4), set up to pick up a rotary movement of a rotor (6) in an electrical machine (16), and a processor element (12), wherein the resolver sensor (4) is set up to output at least one sinusoidal or cosinusoidal amplitude-modulated analogue signal that is characteristic of the rotary movement of the rotor (6), characterized in that the processor element (12) has a data processing unit (12a), a resolver sensor actuation unit (12b) and a resolver sensor evaluation unit (12c), wherein the analogue signal from the resolver sensor (4) is connected directly to the resolver sensor evaluation unit (12c).

Description

technical field [0001] The invention relates to drives for electric vehicles or hybrid vehicles. The invention relates in particular to the determination of the rotational movement of an electric motor. Furthermore, the invention relates in particular to a circuit for evaluating resolver sensor signals in a vehicle, a control device for a vehicle having the circuit according to the invention and a vehicle, in particular a motor vehicle, having the circuit according to the invention and / or the control device according to the invention. Background technique [0002] In an electric vehicle or a hybrid vehicle, the drive power of the vehicle is at least partially provided by the electric machine, thus the electric motor. For optimal control of such electric machines it is often useful to ascertain accurate information about the current operating state of the electric machine. [0003] For this determination, so-called resolver sensors are usually used on electric machines, whi...

AI Technical Summary

Problems solved by technology

[0017] Thus, such undetectable errors may result in the transmission of erroneous rotational speed and angle values, which nevertheless are considered valid by the subsequent control device and may result in a consequential failure of the motor. faulty manipulation

Such an incorrect motor regulation can thus lead to such incorrect actuation of the electric motor, so that the electric motor performs an unsuitable rotational movement or operates with an undesired torque

There may also be a risk of "unintended vehicle movement" or "unexpected direction of vehicle movement" due to a malfunction of the resolver chip

[0018] Such erroneous actuation can lead, for example, to unintentional acceleration of the vehicle, blocking of the drive shaft or even possible destruction of the IGBTs actuating the electric motor.

Images