Power supply device for motor
First Claim
1. A motor power supply including a DC power supply part having a pair of power supply terminals, and an inverter having a pair of connection terminals connected to each other by an additional line, respectively, connected to the pair of power supply terminals of the DC power supply part to receive DC power from the DC power supply part and to supply AC power to a motor, the motor power supply comprising:
- an additional line connecting the pair of connection terminals to each other;
a breaking resistor disposed in the additional line connecting the pair of connection terminals to each other;
a control switching element disposed in serial with the breaking resistor in the additional line;
a breaking switch disposed to one of the connection terminals and switching to either a normal position connecting the one of the connection terminals to a corresponding power supply terminal, or a breaking position connecting the one of the connection terminals to the additional line;
a motor speed detector detecting a speed of the motor; and
a control part controlling the breaking switch to switch to the breaking position and controlling the control switching element so that an on-off interval of the control switching element is controllable depending on the speed detected by the motor speed detector, when the motor is in a dynamic breaking mode.
1 Assignment
0 Petitions
Accused Products
Abstract
A motor power supply including a DC supply part having a pair of supply terminals; an inverter having a pair of connection terminals respectively connected to the supply terminals thereof to receive DC power therefrom and to supply AC power to a motor, a breaking resistor and a control switching element disposed in parallel in an additional line connecting the pair of connection terminals to each other, a control switching element disposed with the breaking resistor in the additional line, a breaking switch disposed to one of the connection terminals and switched to either a normal position or a breaking position connecting the one connection terminal to a corresponding supply part or to the additional line, a speed detector detecting a motor speed and a control part controlling the breaking switch to switch to the breaking position and controlling the control switching element so that an on-off interval of the control switching element is controllable depending on the detected speed
40 Citations
35 Claims
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1. A motor power supply including a DC power supply part having a pair of power supply terminals, and an inverter having a pair of connection terminals connected to each other by an additional line, respectively, connected to the pair of power supply terminals of the DC power supply part to receive DC power from the DC power supply part and to supply AC power to a motor, the motor power supply comprising:
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an additional line connecting the pair of connection terminals to each other;
a breaking resistor disposed in the additional line connecting the pair of connection terminals to each other;
a control switching element disposed in serial with the breaking resistor in the additional line;
a breaking switch disposed to one of the connection terminals and switching to either a normal position connecting the one of the connection terminals to a corresponding power supply terminal, or a breaking position connecting the one of the connection terminals to the additional line;
a motor speed detector detecting a speed of the motor; and
a control part controlling the breaking switch to switch to the breaking position and controlling the control switching element so that an on-off interval of the control switching element is controllable depending on the speed detected by the motor speed detector, when the motor is in a dynamic breaking mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A power supply including a DC supply part having a pair of first terminals, and an inverter having a pair of second terminals, respectively, connectable to the pair of first terminals to supply AC power to a motor, the power supply comprising:
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a switching element;
a wire connectable across the pair of the second terminals;
a breaking resistor disposed in serial with the switching element in the wire;
a breaking switch disposed to connect one of the pair of the second terminals to one of a corresponding one of the first terminals, in a normal position of the breaking switch and the wire, in a breaking position of the breaking switch;
a speed detector detecting a speed of the motor; and
a control part controlling the breaking switch to switch to the breaking position and the switching element so that an on-off interval thereof depends on the speed detected by the speed detector, when the motor is in a dynamic breaking mode.
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12. A power supply including a DC supply unit connected to an inverter to supply AC power to a motor, the power supply comprising:
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a series of a switching element and a breaking resistor connectable across input terminals of the inverter;
a breaking switch disposed to connect one of the input terminals of the inverter to one of the DC supply unit, in a normal position of the breaking switch and the series of the switching element and breaking resistor;
a speed detector detecting a speed of the motor; and
a control part controlling the breaking switch and the switching element so that the breaking switch is switched to the breaking position and on-off interval of the switching element depends on the speed detected by the speed detector, when the motor is in a dynamic breaking mode. - View Dependent Claims (13, 26, 27)
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14. A power supply including a DC supply unit connected to an inverter to supply AC power to a motor, the power supply comprising:
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a series of a switching element and a breaking resistor connectable across input terminals of the inverter;
a breaking switch disposed to connect one of the input terminals of the inverter to one of the DC supply unit and the series; and
a control part detecting the speed of the motor and controlling a switching interval of the switching element according to the detected speed. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 28, 29, 30, 31, 32, 33, 34, 35)
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Specification