| 摘要 |
An automatic speed regulating ECM motor comprises a motor controller (1) and a motor body (2). The motor controller (1) includes a control circuit board on which a microprocessor, an IGBT module, and a motor operation parameter detection unit are arranged. The microprocessor is connected with a first temperature detection unit (5) and a second temperature detection unit (6), and both the temperature detection units (5, 6) are at different positions on the external of the ECM motor to detect temperatures T1 and T2 at different environmental locations. If the temperature difference between the temperature T1 and the temperature T2 is less than or equal to a set value T0, the microprocessor will select a first speed S1 and control the motor to run at the first speed S1 constantly. If the temperature difference between the temperature T1 and the temperature T2 is greater than the set value T0, the microprocessor will select a second speed S2 and control the motor to run at the second speed S2 constantly. Using two temperature detection units to generate a torque control command directly makes it simple in structure, easy to assemble and low in cost. |
