The motor solution using a magnetic encoder is a solution to control motor by combining the permanent magnet synchronous motor (brushless DC motor) and the magnetic encoder. This solution enables to easily evaluate motor control using a magnetic encoder by using sample software in combination with the motor solution kit. Also, can easily check the functions, settings, and software processing of MCU for acquiring position information from the magnetic encoder.

Features

  • Ready to evaluate vector control motor control souiton using the magnetic encoder
  • Sensor output processing sample software for customer shorten the development time.
  • Angle correction function by sensor output correction sample software

What is a magnetic encoder?

A magnetic encoder is a kind of position sensor used for motor control or a sensor which converts the change in the magnetic field into an electric signal to output. The magnetic encoder has two types, The one outputs position information as an analog signal and the other outputs it as a digital signal like encoder. The magnetic encoder which outputs the digital signal can detect an angle using the timer function of the MCU like optical encoder. The magnetic encoder which outputs the analog signal, on the other hand, obtains the output signal (sin, cos) of sensor with the AD mounted on MCU and angle information with arc tangent.

Magnetic encoder outputting digital

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Magnetic encoder outputting digital

Magnetic encoder outputting analog

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Magnetic encoder outputting analog

System configuration

Magnetic encoder outputting digital

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Magnetic encoder outputting digital

Magnetic encoder outputting analog

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Magnetic encoder outputting analog

Output signal correction by the magnetic encoder which outputs analog

The magnetic encoder which outputs the analog signal can obtain correct angle information by adjusting offset , gain (amplitude) and phase for the outputted analog signal. In this solution, these are automatically adjusted during startup, which enables to obtain correct angle information. If you use the magnetic encoder which outputs the digital signal, please refer to the sample software for vector control using encoder.

Offset・gain correction

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Offset・gain correction

Phase correction

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Phase correction

In this solution, the operation has been confirmed using TMR magnetic encoder by TDK, TAD2141 (digital output) and TAS2143 (analog output).

System configuration & Solution menu list

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システム構成と提供物

Sample software&Application note

CPU card

RX24T CPU card

Inverter board

Evaluation System for BLDC Motor (In preparation)
24V Motor Control Evaluation System for RX23T

Link for related information