Microchip E-Bike Tech Q&A - How Is EV Speed Control Detected?

[Alan_Yang]

Q: How is the speed of an E-Bike detected and controlled?

A: Currently, sensor-based solutions are used, and the speed is calculated based on the feedback from the sensor.

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Main Methods for Speed Detection of E-Bikes

Sensor-Based Solution (Sensored Control)

This refers to installing physical position sensors (usually Hall sensors or encoders) on the motor to directly detect changes in the rotor position, thereby calculating the speed.

(Image source: Microchip)

Related Products

• Hall Sensors
• Current Sensors

Related Application Notes

Microchip Application Note: Encoder-Based Sensored Field-Oriented Control for Three-Phase Permanent Magnet Synchronous Motors (PMSM)

Sensorless Solution

This method relies on hardware measurement and avoids issues such as unstable low-speed operation or difficulty in starting that may occur with pure algorithmic estimation.

(Image source: Microchip)

More Content Related to FOC

• Why Use a DSP to Control a Three-Phase Permanent Magnet Synchronous Motor (PMSM)?

Related Products:

• Digital Signal Controller (DSC) — dsPIC33CK256MP508
• Gate Driver — MIC4104YM
• DC-DC Converter — MIC2129
• Regulator — MCP16301HT
• Low-Dropout Regulator (LDO) — MCP1826ST-3302E/DB
• CAN Transceiver — MCP2561-E/SN
• Serial Flash — SST25PF040C-40E
• Current Limiter — MIC2091-1YM5-TR
• Comparators — MCP6569T-E/ST
• Voltage Reference — LM4040CYM3-2.5-TR
• Operational Amplifiers (Op-AMPs) — MCP651ST-E/OT

More related Microchip E-Bike Tech Q&A：

• Microchip E-Bike Tech Q&A - How to Divide Work for Real-Time Motor Control & Communication?
• Microchip E-Bike Tech Q&A - How Is EV Speed Control Detected?
• Microchip E-Bike Tech Q&A - What is the scheme architecture of E-Bike?
• Microchip E-Bike Tech Q&A - How to Ensure Anti-Interference & Data Accuracy of Speed Acquisition?
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