Braking apparatus for three-phase brushless motor
A technology of brushless motors and braking devices, which is applied to the deceleration device of AC motors, stop devices, electric motor/converter plugs, etc., can solve the problems of damaging the user's sense of use and increasing the reaction force, and prevent Effects of adverse effects, reduction of withstand voltage, and cost reduction
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[0054] Embodiments of the present invention will be described below based on the drawings.
[0055] In this embodiment, it is a motor used when driving a three-phase brushless motor (hereinafter simply referred to as a motor) 2 as a power source in electric equipment such as the above-mentioned cordless lawn mower or cordless saw. The present invention is applied to the driving device 10 .
[0056] like figure 1 As shown, the motor drive device 10 of this embodiment includes a power supply line connected to the positive side of the battery 4 as a DC power supply, and a ground line connected to the negative side of the battery 4 .
[0057] Furthermore, a switch circuit 12 for controlling the current flowing in each phase U, V, and W of the motor 2 is provided between the power supply line on the positive side and the ground line on the negative side.
[0058] The switching circuit 12 consists of three switching elements Q1, Q2, Q3 (specifically, the U-phase high-voltage end s...
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