Method for acquiring constant torque of electronically commutated motors
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United States of America Patent
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Nov 28, 2017
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N/A
app pub date -
Nov 16, 2016
filing date -
Feb 12, 2015
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Abstract
A method for acquiring a constant torque of an ECM, the method including: A) acquiring a target torque value T0 input from external; B) when the motor is in a non-use state, operating the motor and acquiring an initial rotational speed rpm by the microprocessor; and when the motor is in an operating state, acquiring a current rotational speed rpm by the microprocessor; C) calculating a corresponding target bus current value Itad by the microprocessor using the function of a DC bus current Itad=F(T, rpm) according to the target torque T0 and acquired rotational speed rpm, in which T represents a torque value output by the motor; and D) comparing the target bus current Itad with a real-time bus current Ibus by the microprocessor in a closed-loop control according to the detected real-time bus current Ibus.
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