Measuring Resolver Rotation Angles

A resolver is used as a sensor to accurately measure the angular position of the motor.
Resolvers are used in harsh environments such as industrial motors, servers, and electric vehicles (EVs) because they can operate under demanding conditions for extended period of time.
In order to increase EV range, it's necessary to control motors with a high degree of precision so as to boost their energy efficiency.

Measurement Example

Calculate The Resolver's Rotational Angle
Using Waveform Calculations.

The resolver's excitation signal and output signal are input to the 4ch Analog Unit U8978. Since setups that would have required two slots with previous models can be accommodated with a single slot, there's capacity left over to measure temperature, control signals, torque, and current signals at the same time. The instrument's waveform calculation function is used to calculate the resolver's rotational angle. Motor control sequences can be adjusted by analyzing the relationship between the resolver rotation angle and other signals.

Equipment Used

MEMORY HiCORDER MR6000/MR6000-01

MEMORY HiCORDERMR6000/MR6000-01

The 4ch Analog Unit U8978 can be used to measure a resolver's excitation signal and output signal (sinθ and cosθ) with a single unit slot. Additionally, the MR6000/MR6000-01's high-speed waveform calculation function can be used to display the rotational angle.
Products Page Brochure
4CH ANALOG UNIT U8978

4CH ANALOG UNITU8978

Aplication

Calculate a Resolver's Angle of Rotation

You can download a catalog that summarizes the applications introduced on the special site.

Request for Catalog PDF Download

© 2020 HIOKI E.E. CORPORATION