Brushless motor with torque brake

Abstract

To provide a brushless motor provided with a function of idling with an external force while varying a stop torque even when at rest in addition to speed and torque limitations in forward rotation and reverse rotation.SOLUTION: A coil U phase, a coil V phase, and a coil W phase are star-connected, and a neutral point is drawn to the outside. The coil U phase is connected to a driving rotation U, the coil V phase is connected to driving rotation V, the coil W phase is connected to driving rotation W, and the neutral point is connected to a driving rotation neutral point. General driving is performed at the time of rotation, and at the time of stop, a current of the same phase is applied to the neutral point and an UVW phase to control a stop torque. In order to smooth variations due to angle as well, the coil U phase, the coil V phase, and the coil W phase at a first stage and the coil U phase, the coil V phase, and the coil W phase at a second stage are sequentially connected while being shifted in angle, and a rotor is inserted.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] In addition to limiting the forward and reverse speed and torque, this brushless motor also has a function that allows it to vary the stopping torque and spin freely when an external force is applied when stopped.

[0002] In order to use the motor to reduce or wind up rolled materials, the motor is equipped with a torque adjustment function when it is stopped as well as when it is rotating, making it possible to idle passively when stopped by an external force. Summary of the Invention Problems that the invention aims to solve

[0003] When placed in equipment that reduces, processes, and winds up rolled material, it is possible to wind up the material at a constant torque using a motor, but reducing the material is difficult because the motor's work is rotation, and although powder brakes or electromagnetic brakes are usually used, they are unable to absorb the slack. The brushless motor with torque brake controls the torque when stopped, and when an external force is applied, it idles to reduce the amount of fabric, and if necessary, it rotates in the reverse direction to absorb slack. Also, if an external force exceeding the stopping torque is applied, it rotates in the forward direction to forcibly feed the fabric, eliminating the need for a tension compensation function between the amount of fabric and the processing equipment.

[0004] To increase the stopping torque, the motor windings are star-connected and the neutral point and the UVW phases are aligned to control the torque, which makes it possible to increase the stopping torque more than a normal motor. In permanent magnet motors, multiple motors are connected with their angles shifted, reducing variations in stopping torque due to the stopping angle that arises from the polarity of the stator and the polarity of the rotor, and smoothing out idling caused by external forces.

[0005] By increasing the motor's stopping torque and smoothing out variations in stopping torque due to the stopping angle, braking characteristics similar to those of a powder brake can be obtained. Also, by operating as a motor, various controls such as absorbing slack and forced feeding become possible. When reducing rice yields through intermittent operation, it is necessary to rapidly attenuate the external force, so this can be achieved by using it in combination with patent pending idos3188134. [Brief explanation of the drawings]

[0006] [Figure 1] 1 is a configuration diagram showing a first embodiment of the invention according to this application. [Figure 2] FIG. 1 is a configuration diagram showing the operation of a first embodiment of the invention according to this application. DETAILED DESCRIPTION OF THE INVENTION

[0007] The coil U phase (1), coil V phase (2), and coil W phase (3) are star-connected, and the neutral point (4) is pulled out to the outside. The coil U phase (1) is connected to the drive rotation U (5), the coil V phase (2) is connected to the drive rotation V (6), the coil W phase (3) is connected to the drive rotation W (7), and the neutral point (4) is connected to the drive rotation neutral point (8). The first stage coil U phase (1a), V phase (2a), and W phase (3a) are connected with the second stage coil U phase (1b), V phase (2b), and W phase (3b) at different angles. If the number of stages is increased further, 1c, 2c, and 3c are connected and the rotor (9) is inserted. [Explanation of symbols]

[0008] 1 coil U phase 2 coil V phase 3 coil W phase 4 Neutral point 5 Drive Rotation U 6 Drive Rotation V 7 Drive Rotation W 8 Drive rotation neutral point 9 Rotor 1a coil U phase 1 stage 1b Coil U phase 2 stages 1c coil U phase 3 stages 2a coil V phase 1 stage 2b Coil V phase 2 stages 2c Coil V with 3 stages 3a coil W phase 1 stage 3b W-phase 2-stage coil 3c coil W-phase 3-stage Below 4abc 5adc

Claims

1. A brushless motor with a torque brake that continuously controls the stopping torque and rotational torque.

2. A brushless motor with torque brake that subdivides the stopping angle by connecting multiple motors at different angles.

3. A brushless motor with a torque brake, in which the motor windings are star-connected and the stopping torque is adjusted by controlling the current at the neutral point and the UVW phases.

4. A brushless motor with torque brake that connects multiple motors by shifting the magnetic pole angle of the rotor, canceling out attraction and repulsion and allowing smooth idling against external forces.

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