Resolver, commonly known as "rotary transformer", has a history almost as long as that of motion control.

Because of its high reliability (compared to optical encoders), robustness and durability, it is often used as position feedback for rotary motion and is used in some very harsh equipment environments, such as wind power, construction machinery... etc.

For traditional motor solutions there are many problems to be solved.

We need to choose a larger motor to ensure that the torque step margin; open-loop control of stepper motors consume high current and generate a lot of heat; torque pulsation will cause vibration and noise; Then how do we ensure that the motor control can still maintain high precision operation in harsh environments?It may be worthwhile to see how to solve these problems in Jnchip (Hong Kong).

The Resolver is a highly environmentally friendly motor position sensor that enables high-precision control of motors in harsh environments such as high temperatures, dust and vibration.

It acquires angular information by converting the resolver analog signal into a digital signal.

High precision motor control is possible even in harsh environments with heat, dust or vibration.

High-speed response and low cost can be achieved by using a new RDC IC controlled in conjunction with an MCU.

The RDC IC driver automatically corrects the gain, phase and angle errors of the resolver signal to achieve high accuracy.