Motor power supply
First Claim
1. A motor power supply comprising a DC power supply having a pair of power output terminals, and an inverter having a pair of connection terminals connected to the power output terminals of the DC power supply through a pair of power lines, and converting power from the DC power supply to supply the converted power to a motor having a plurality of power input terminals, the motor power supply comprising:
- a braking resistor provided in an additional line connecting the connection terminals with each other;
a switching part provided at one of the connection terminals, and selectively connecting the one of the connection terminals with the power output terminal corresponding to the one of the connection terminals, or with the additional line; and
a controller controlling the switching part.
2 Assignments
0 Petitions
Accused Products
Abstract
A motor power supply including a DC power supply having a pair of power output terminals, and an inverter having a pair of connection terminals connected to the power output terminals of the DC power supply through a pair of power lines, converting power from the DC power supply to supply the converted power to a motor having a plurality of power input terminals, the motor power supply including a braking resistor provided in an additional line connecting the connection terminals with each other; a switching part provided at one of the connection terminals, and selectively connecting the one of the connection terminals with the power output terminal corresponding to the one of the connection terminals, or with the additional line; and a controller controlling the switching part. Components common to both a dynamic braking circuit and the inverter decrease the total size and cost of the motor supply power.
18 Citations
17 Claims
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1. A motor power supply comprising a DC power supply having a pair of power output terminals, and an inverter having a pair of connection terminals connected to the power output terminals of the DC power supply through a pair of power lines, and converting power from the DC power supply to supply the converted power to a motor having a plurality of power input terminals, the motor power supply comprising:
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a braking resistor provided in an additional line connecting the connection terminals with each other;
a switching part provided at one of the connection terminals, and selectively connecting the one of the connection terminals with the power output terminal corresponding to the one of the connection terminals, or with the additional line; and
a controller controlling the switching part. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A braking circuit for a motor having a plurality of power input terminals, comprising:
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a DC power supply with a first terminal and a second terminal;
an inverter with a first terminal and a second terminal, and being connected to the power input terminals of the motor;
a switch at the first terminal of the inverter, the switch having a first contact point and a second contact point, the second contact point connected to the first terminal of the DC power supply;
a braking resistor connected between the first contact point and the second terminal of the inverter, the second terminal of the DC power supply being connected to the second terminal of the inverter; and
a controller controlling the switch. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A motor power supply for a motor having a plurality of power input terminals, comprising:
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a DC power supply having a pair of power output terminals, the DC power supply comprising an AC power supply, a rectifying part rectifying power supplied from the AC power supply, and a capacitor smoothing the rectified power from the rectifying part;
an inverter having a pair of connection terminals connected to the power output terminals of the DC power supply through a pair of power lines, and converting power from the DC power supply to supply the converted power to the motor, the inverter comprising a plurality of inverting circuits respectively connected to the capacitor in parallel, each inverting circuit having inverting members comprising a transistor and a diode that are connected in parallel, and the power input terminals of the motor being respectively connected between the inverting members of each inverting circuit;
a braking resistor provided in an additional line connecting the connection terminals with each other;
a switching part provided at one of the connection terminals, and selectively connecting the one of the connection terminals with the power output terminal corresponding to the one of the connection terminals, or with the additional line, wherein the braking resistor, the switching part, and the diodes form a dynamic braking circuit to bring the motor to a sudden stop, preventing the motor from freely rotating due to an external force, and the diodes are commonly used by the dynamic braking circuit and the inverter to reduce a size and cost of the motor power supply.
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Specification