Patent US4801964A successfully refreshed from Google Patents.
Patent US6876163B2 successfully refreshed from Google Patents.
US6876163B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
DC motor having a braking circuit
Assignee: Automotive Components Holdings LLC
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Filing: 2003-04-14
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Granted: 2005-04-05
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Expires: 2023-04-14
Abstract
Abstract A circuit for controlling a motor's operation is disclosed. The circuit includes a relay and a motor braking circuit portion. The relay selectively interconnects a voltage source with one of a braking terminal and a motor terminal. The motor braking circuit portion has a motor brake switch connected on a first switch side to the motor terminal and a second switch side to the electrical ground. The brake switch is activated to brake the motor when the relay interconnects the voltage source with the braking terminal.
Inventors
- 👤 Gary E. Zack
- 👤 Charlie Richlie
- 👤 Chung H. Peng
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:45
CPC Classifications
H; H02; H02P; H02P6/00; H02P6/24; H02P3/00; H02P3/06; H02P3/08; H02P3/12
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
124 words
A circuit for controlling a motor's operation, the motor including a first and second motor terminal, the circuit comprising: a relay for selectively interconnecting a voltage source with a braking terminal and the first motor terminal; a motor braking circuit electrically connected to the braking terminal, the motor braking circuit having a semiconductor switch device connected to the first motor terminal and braking terminal, wherein the semiconductor switch device is activated to brake the motor when the relay interconnects the voltage source with the braking terminal; a filter circuit interconnected between the voltage source and the semiconductor switch device; and a deactivation, circuit in parallel electrical connection with the filter circuit for switching the semiconductor switch from an on state to an off state.
Claim 2
Dependent Claim
124 words
A circuit for controlling a motor's operation, the motor including a first and second motor terminal, the circuit comprising: a relay for selectively interconnecting a voltage source with a braking terminal and the first motor terminal; a motor braking circuit electrically connected to the braking terminal, the motor braking circuit having a semiconductor switch device connected to the first motor terminal and braking terminal, wherein the semiconductor switch device is activated to brake the motor when the relay interconnects the voltage source with the braking terminal; a filter circuit interconnected between the voltage source and the semiconductor switch device; and a deactivation, circuit in parallel electrical connection with the filter circuit for switching the semiconductor switch from an on state to an off state.
Claim 3
Dependent Claim
17 words
The circuit of claim 1 , wherein the second motor terminal is connected to the electrical ground.
Claim 4
Dependent Claim
14 words
The circuit of claim 1 , wherein the relay is a form C relay.
Claim 5
Dependent Claim
27 words
The circuit of claim 1 , wherein a control input of the semiconductor switch device is selectively connected to the voltage source and to the electrical ground.
Claim 6
Dependent Claim
31 words
The circuit of claim 1 , wherein the filter circuit includes a resister in electrical series connection with the brake switch and a capacitor in parallel connection with the brake switch.
Claim 7
Dependent Claim
23 words
The circuit of claim 1 , further comprising a fault protection circuit, in connection with the first motor terminal and the voltage source.
Claim 8
Dependent Claim
39 words
The circuit of claim 6 , wherein the fault protection circuit includes a diode and a resistive load, wherein the diode and the resistive load are in electrical series connection between the first motor terminal and the voltage source.
Claim 9
Dependent Claim
28 words
The circuit of claim 1 , wherein the semiconductor switch device is a field effect transistor, the field effect transistor having a gate, a drain, and a source.
Claim 10
Dependent Claim
26 words
The circuit of claim 8 , wherein the gate of the field effect transistor is selectively connected to the voltage source and to the electrical ground.
Claim 11
Dependent Claim
21 words
The circuit of claim 8 , wherein the drain of the field effect transistor is connected to the first motor terminal.
Claim 12
Dependent Claim
20 words
The circuit of claim 8 , wherein the source of the field effect transistor is connected to the electrical ground.
Claim 13
Dependent Claim
30 words
The circuit of claim 8 , further comprising a first diode, in electrical connection with the first motor terminal and the gate to prevent deactivation of the field effect transistor.
Claim 14
Dependent Claim
35 words
The circuit of claim 8 , further comprising a voltage limiting circuit for setting an active clamp voltage for the field effect transistor and preventing excessive source to drain voltage for the field effect transistor.
Claim 15
Dependent Claim
27 words
The circuit of claim 13 , wherein the voltage limiting circuit includes two diodes connected in electrical series connection between the first motor terminal and the gate.
Claim 16
Dependent Claim
21 words
The circuit of claim 8 , further comprising a filter circuit interconnected between the voltage source and the motor brake switch.
Claim 17
Dependent Claim
28 words
The circuit of claim 1 , wherein the deactivation circuit includes a diode and a resistive load, the diode is in electrical series connection with the resistive load.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2008-04-04 | 2008-10-04 | 2009-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2012-04-04 | 2012-10-04 | 2013-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2016-04-04 | 2016-10-04 | 2017-04-05 | $7700.00 | Window Closed / Lapsed |