IN IN1209DE2012A
A variable rotation speed motor control system and method thereof, comprising a status control module, a DC/DC boost converter module, a motor phase-current driver module, a motor, a phase-current detection module and a power supply module. The power supply module is able to use a battery for provision of lower voltage. When the rotation speed of a motor is sufficiently high, it is possible to maintain proper torque output during high rotation speed of an electric vehicle by using the DC/DC boost converter module to boost the input voltage and by applying the phase advance through the status control module. With an appropriate design, the motor control design according to the present invention can replace the conventional mechanical variable rotation speed system requiring mechanical variable speed system thereby simplifying the system and saving manufacturing costs.
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