| 摘要 |
PURPOSE:To inexpensively brake a motor in a motor low speed rotating range without necessity of a mechanical unit at a motor shaft by adding a device for consuming generating energy of a brushless synchronous motor to an inverter for driving the motor. CONSTITUTION:When a braking transistor 6 ia turned ON by a brake controller 9, 3-phase induction voltages are three-phase full-wave rectified by flywheel diodes DX-DZ and rectifying diodes DX'-DZ'. Further, a braking resistor 5 consumes as thermal energy due to the flow of a current by a full-wave rectified voltage. Accordingly, since a deceleration torque is consumed as generating energy via the resistor, braking time can be shortened as compared with the case in which it is stopped only by mechanical loss. |
