Fan system and brake control circuit thereof
First Claim
1. A fan system, comprising:
- a motor with a coil module having a first connection terminal and a second connection terminal;
a storage unit electrically coupling with a voltage source, storing electrical energy when the voltage source is available, and releasing the stored electrical energy to carry out a brake operation when the voltage source is unavailable;
a driver electrically coupling with the first and second connection terminals of the coil module to control a direction of an inductor current passing through the coil module, wherein the driver is a full bridge driver having an upper switch module and a lower switch module, with each of the upper and lower switch modules being constructed by two electronic power switches;
a buffer circuit electrically coupling with the coil module;
a control unit electrically coupling with the driver; and
a brake circuit electrically coupling with the control unit, with the brake circuit having two electronic power switches, with each of the two electronic power switches of the brake circuit having an output terminal, and with the two output terminals respectively coupling with the electronic power switches of the lower switch module through input terminals thereof,wherein, in the brake operation, the buffer circuit operates to form a transient potential between the first and second connection terminals of the coil module and to consume electrical energy of the inductor current, for gradually stopping the motor in a buffering time period.
2 Assignments
0 Petitions
Accused Products
Abstract
A fan system including a motor with a coil, a storage unit, a driver, and a buffer circuit is provided. The coil module has a first connection terminal and a second connection terminal. The storage unit electrically couples with a voltage source, stores electrical energy when the voltage source is available, and releases the stored electrical energy to carry out a brake operation when the voltage source is unavailable. The driver electrically couples with the first and second connection terminals of the coil module to control a direction of an inductor current passing through the coil module. The buffer circuit electrically couples with the coil module. In the brake operation, the buffer circuit operates to form a transient potential between the first and second connection terminals of the coil module and to consume electrical energy of the inductor current, for gradually stopping the motor in a buffering time period.
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Citations
42 Claims
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1. A fan system, comprising:
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a motor with a coil module having a first connection terminal and a second connection terminal; a storage unit electrically coupling with a voltage source, storing electrical energy when the voltage source is available, and releasing the stored electrical energy to carry out a brake operation when the voltage source is unavailable; a driver electrically coupling with the first and second connection terminals of the coil module to control a direction of an inductor current passing through the coil module, wherein the driver is a full bridge driver having an upper switch module and a lower switch module, with each of the upper and lower switch modules being constructed by two electronic power switches; a buffer circuit electrically coupling with the coil module; a control unit electrically coupling with the driver; and a brake circuit electrically coupling with the control unit, with the brake circuit having two electronic power switches, with each of the two electronic power switches of the brake circuit having an output terminal, and with the two output terminals respectively coupling with the electronic power switches of the lower switch module through input terminals thereof, wherein, in the brake operation, the buffer circuit operates to form a transient potential between the first and second connection terminals of the coil module and to consume electrical energy of the inductor current, for gradually stopping the motor in a buffering time period. - View Dependent Claims (2)
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3. A fan system, comprising:
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a motor with a coil module having a first connection terminal and a second connection terminal; a storage unit electrically coupling with a voltage source, storing electrical energy when the voltage source is available, and releasing the stored electrical energy to carry out a brake operation when the voltage source is unavailable; a driver electrically coupling with the first and second connection terminals of the coil module to control a direction of an inductor current passing through the coil module; and a buffer circuit electrically coupling with the coil module, wherein the buffer circuit comprises a buffer element and an actuating member in series connection with the buffer element, with a combination circuit of the buffer element and the actuating member coupling with the coil module in parallel connection, wherein, in the brake operation, the buffer circuit operates to form a transient potential between the first and second connection terminals of the coil module and to consume electrical energy of the inductor current, for gradually stopping the motor in a buffering time period. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10)
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11. A fan system, comprising:
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a motor with a coil module having a first connection terminal and a second connection terminal; a storage unit electrically coupling with a voltage source, storing electrical energy when the voltage source is available, and releasing the stored electrical energy to carry out a brake operation when the voltage source is unavailable; a driver electrically coupling with the first and second connection terminals of the coil module to control a direction of an inductor current passing through the coil module, wherein the driver is a full bridge driver having an upper switch module and a lower switch module, with each of the upper and lower switch modules being constructed by two electronic power switches; a buffer circuit electrically coupling with the coil module, wherein the buffer circuit comprises a buffer element and an actuating member in series connection with the buffer element, with a combination circuit of the buffer element and the actuating member coupling between the first connection terminal of the coil module and the storage unit; and a control unit electrically coupling with the driver; wherein, in the brake operation, the buffer circuit operates to form a transient potential between the first and second connection terminals of the coil module and to consume electrical enemy of the inductor current, for gradually stopping the motor in a buffering time period. - View Dependent Claims (12, 13, 14)
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15. A fan system, comprising:
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a motor with a coil module having a first connection terminal and a second connection terminal; a storage unit electrically coupling with a voltage source, storing electrical energy when the voltage source is available, and releasing the stored electrical energy to carry out a brake operation when the voltage source is unavailable; a driver electrically coupling with the first and second connection terminals of the coil module to control a direction of an inductor current passing through the coil module, wherein the driver is a full bridge driver having an upper switch module and a lower switch module, with each of the upper and lower switch modules being constructed by two electronic power switches; a buffer circuit electrically coupling with the coil module, wherein the buffer circuit comprises a buffer element, an actuating member, a first power state sensing switch, and a second power state sensing switch, with the buffer element serially connecting with the actuating member, with a combination circuit of the buffer element and the actuating member coupling between the first connection terminal of the coil module and the ground, with the first power state sensing switch electrically coupling with the actuating member, and with the second power state sensing switch electrically coupling with one of the two electronic power switches of the lower switch module; and a control unit electrically coupling with the driver and the buffer circuit; wherein, in the brake operation, the buffer circuit operates to form a transient potential between the first and second connection terminals of the coil module and to consume electrical energy of the inductor current, for gradually stopping the motor in a buffering time period. - View Dependent Claims (16, 17, 18, 19)
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20. A brake control circuit of a fan system, comprising:
a buffer circuit actuated when a voltage source of a fan system is turned off, with the actuated buffer circuit forming a transient potential between a first connection terminal and a second connection terminal of a coil module of the fan system for consuming a inductor current of the coil module, so as to gradually stop the fan system in a buffering time period. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
Specification