CN101762780A - Motor control and detection circuit of forced-exhaust gas water heater - Google Patents
Motor control and detection circuit of forced-exhaust gas water heater Download PDFInfo
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- CN101762780A CN101762780A CN200810235872A CN200810235872A CN101762780A CN 101762780 A CN101762780 A CN 101762780A CN 200810235872 A CN200810235872 A CN 200810235872A CN 200810235872 A CN200810235872 A CN 200810235872A CN 101762780 A CN101762780 A CN 101762780A
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Abstract
The invention discloses a motor control and detection circuit of a forced-exhaust gas water heater. In the invention, one end of 220V AC is connected with an AC motor, a controlled silicon controller is connected with the two ends of a capacitance C21 and a resistance R4 in parallel and also connected in series with the AC motor and a motor detection circuit; the capacitance C21 and the resistance R4 are connected with each other in series; a resistance R3 is connected with an output terminal of a motor PWM signal output circuit and the motor detection circuit; both ends of a diode assembly are connected with the motor control circuit and the other end of the 220V AC; an optical coupler LA and a resistance R1 that are connected in series are connected at the two ends of the diode assembly in parallel; an output signal terminal of the optical coupler LA is connected with a base terminal of a triode DQ5; a collector terminal of the triode DQ5 is connected with a +5V power supply, and an emitting stage terminal of the triode DQ5 is grounded; and the collector terminal of the triode DQ5 is used as the motor detection terminal. In the invention, the controlled silicon controller controls the running of the motor and completes motor failure judgment by matching the motor detection circuit, judges that whether the motor is in failure or not according to the changes of the high-low level at the motor detection terminal and has simple operation and reliable running.
Description
Technical field
The present invention relates to a kind of gas heater motor control and detection circuit, especially a kind of motor control and detection circuit of forced-exhaust gas water heater.
Background technology
Forced-ventilated (dividing large and small fire, two sections fire rows), gas heater generally adopted the motor (switch two groups of different windings and realize two kinds of wind speed conversion) that exchanges two speed aspect the motor control, when segmentation switching or large and small fire switching, motor comes the conversion wind speed owing to switching by relay, so only need judge the conversion of motor testing circuit high-low level is whether the decidable motor exists open fault.
Summary of the invention:
The invention provides a kind of motor control and detection circuit of forced-exhaust gas water heater, utilization controllable silicon controller control motor operation cooperates the motor testing circuit to realize the detection of motor under running status and holding state.
The technical solution adopted in the present invention is:
A kind of motor control and detection circuit of forced-exhaust gas water heater, comprise a motor control circuit and a motor testing circuit, described motor control circuit has a motor pulse width modulation (Pulse Width Modulation, be called for short PWM) signal output apparatus, described motor control circuit also comprises an AC motor, one controllable silicon controller TR1, one resistance R 3, capacitor C 21 and resistance R 4, described capacitor C 21 and resistance R 4 serial connections, and circuit two ends and described controllable silicon controller TR1 two links after capacitor C 21 and resistance R 4 serial connections also connect, AC motor input end is electrically connected with 220V AC power one end, controllable silicon controller TR1 two links are connected in series with AC motor output end and described motor testing circuit input end respectively, this controllable silicon controller TR1 Enable Pin is electrically connected with described motor pwm signal output circuit output terminal, and described resistance R 3 two ends are connected in series with motor PWM output circuit output terminal and motor testing circuit input end respectively; Described motor testing circuit comprises a diode group, one photo-coupler LA, one triode DQ5 and resistance R 1, described diode group input end is connected in series with described motor control circuit output terminal, this diode group output terminal is electrically connected with the 220V AC power other end, described resistance R 1 one ends are connected in series with photo-coupler LA one input end, resistance R 1 other end and another input end of photo-coupler LA are respectively with described diode group 21 two ends and connect, the output terminal of described photo-coupler LA is electrically connected with described triode DQ5 base terminal, this triode DQ5 emitter terminal ground connection and collector terminal are electrically connected with+5V power supply, the collector terminal of described triode DQ5 externally transmits the motor test side of signal as this testing circuit, described diode group comprises the reverse diode D3 that is connected that forward connects diode D2 and a plurality of serial connections, and this forward connects diode D2 and these a plurality of serial connections oppositely is connected between diode D3 and connects.
The diode group of described motor testing circuit comprises the reverse diode D3 that is connected that forward connects diode D2 and three serial connections, and this forward connects diode D2 and these three serial connections oppositely is connected between diode D3 and connects.
Be connected in series the electrochemical capacitor E4 of a filtering AC noise between the motor test side of described motor testing circuit and ground.
The invention has the beneficial effects as follows: the present invention gets principle of work and is: under the open state, motor PWM output circuit is exported the pwm signal of a sequential alternate, controllable silicon controller TR1 Enable Pin receives conducting controllable silicon controller behind this pwm signal: 1) if the AC motor operations is normal, then ac signal is via the AC motor, with the motor testing circuit, because the pressure drop of diode group makes photo-coupler LA conducting, thereby makes motor test side output low level; 2) as if AC motor open fault, then the motor control circuit open circuit ends thereby photo-coupler LA ends triode DQ5, and the motor test side is series at+the 5V power supply, therefore exports high level.Thereby as seen: under open state, the motor test side detects low level, shows AC motor operations normal (being that fan operation is normal), can normally open the valve point fire; The motor test side detects high level, then shows the motor open fault, and machine is quoted failure code, stops out the action of valve point fire, if detect high level when operation, control system is cut off source of the gas at once with the electromagnetic valve body closure, guarantees safety; Under the holding state, TR1 ends thereby motor PWM output circuit output terminal does not have pwm signal output controllable silicon controller, AC signal is through the AC motor, capacitor C 21 and resistance R 4 by serial connection enter the motor testing circuit, the photo-coupler LA conducting that sequential replaces along with discharging and recharging of capacitor C 21, end, thereby make conducting that triode DQ5 sequential replaces, end, output low level during triode DQ5 conducting, export the 5V high level when ending, thereby produce the square-wave signal (ac power frequency is 50HZ) of a peak value 5V frequency 50HZ; If AC motor open circuit fault, then as: export a high level one, 2).Thereby as seen: under holding state, the motor test side detects the square-wave signal of a peak value 5V frequency 50HZ, shows that motor is normal, can start at any time; The motor test side detects then motor open fault of high level, and machine will not enter normal start-up routine.
Therefore this example is finished the control and the fault verification of motor by motor control circuit and combining of motor testing circuit, and during detection, the high-low level by the motor test side changes whether judge motor failure, and is simple to operate, reliable.
Description of drawings
Fig. 1 is a circuit diagram of the present invention;
Embodiment
Embodiment: a kind of motor control and detection circuit of forced-exhaust gas water heater, comprise a motor control circuit 1 and a motor testing circuit 2, described motor control circuit 1 has a motor pwm signal output circuit, described motor control circuit 1 also comprises an AC motor 11, one controllable silicon controller TR1, one resistance R 3, capacitor C 21 and resistance R 4, capacitor C 21 and resistance R 4 serial connections, and circuit two ends and described controllable silicon controller TR1 two links after capacitor C 21 and resistance R 4 serial connections also connect, AC motor 11 input ends are electrically connected with 220V AC power one end, controllable silicon controller TR1 two links are connected in series with AC motor 11 output terminals and described motor testing circuit 2 input ends respectively, this controllable silicon controller TR1 Enable Pin is electrically connected with described motor pwm signal output circuit output terminal, and described resistance R 3 two ends are connected in series with motor PWM output circuit output terminal and motor testing circuit 2 input ends respectively; Described motor testing circuit 2 comprises a diode group 21, one photo-coupler LA, one triode DQ5 and resistance R 1, described diode group 21 input ends are connected in series with described motor control circuit 1 output terminal, these diode group 21 output terminals are electrically connected with the 220V AC power other end, described resistance R 1 one ends are connected in series with photo-coupler LA one input end, resistance R 1 other end and another input end of photo-coupler LA are respectively with described diode group 21 two ends and connect, the output terminal of described photo-coupler LA is electrically connected with described triode DQ5 base terminal, this triode DQ5 emitter terminal ground connection and collector terminal are electrically connected with+5V power supply, the collector terminal of described triode DQ5 externally transmits the motor test side of signal as this testing circuit, described diode group 21 comprises the reverse diode D3 that is connected that forward connects diode D2 and a plurality of serial connections, and this forward connects diode D2 and these a plurality of serial connections oppositely is connected between diode D3 and connects.
The diode group 21 of described motor testing circuit 2 comprises the reverse diode D3 that is connected that forward connects diode D2 and three serial connections, and this forward connects diode D2 and these three serial connections oppositely is connected between diode D3 and connects.
Be connected in series the electrochemical capacitor E4 of a filtering AC noise between the motor test side of described motor testing circuit 2 and ground.
Principle of work of the present invention is:
One, under open state, motor PWM output circuit is exported the pwm signal of a sequential alternate, controllable silicon controller TR1 Enable Pin receives conducting controllable silicon controller behind this pwm signal: 1) if AC motor 11 is working properly, then ac signal is via AC motor 11, with motor testing circuit 2, because the diode group is connected diode D2 and connects with a forward by the reverse connection diode D3 of a plurality of serial connections and forms, pressure drop by diode D3 makes the photo-coupler LA two ends that are connected in these diode group two ends by series resistor R1 have voltage to produce, the luminous conducting photistor of the LED P C2 Q2 of photo-coupler LA, thereby photo-coupler output terminal output+5V electric signal makes triode Q5 collector terminal and emitter terminal conducting, because emitter terminal ground connection, thereby make motor test side output low level; 2) as if AC motor 11 open faults, then motor control circuit 1 open circuit ends thereby photo-coupler LA ends triode DQ5, and the motor test side is series at+the 5V power supply, therefore exports high level.Thereby as seen: under open state, the motor test side detects low level, shows AC motor 11 (being that fan operation is normal) working properly, can normally open the valve point fire; The motor test side detects high level, then shows the motor open fault, and machine is quoted failure code, stops out the action of valve point fire, if detect high level when operation, control system is cut off source of the gas at once with the electromagnetic valve body closure, guarantees safety.
Two, under holding state, TR1 ends thereby motor PWM output circuit output terminal does not have pwm signal output controllable silicon controller, AC signal is through AC motor 11, capacitor C 21 and resistance R 4 by serial connection enter motor testing circuit 2, photo-coupler LA is by the resistance R 1 serial connection motor control circuit 1 and the 220V AC power other end, the photo-coupler LA conducting that sequential replaces along with discharging and recharging of capacitor C 21, end, thereby the conducting that triode DQ5 sequential is replaced, end, output low level during triode DQ5 conducting, export the 5V high level when ending, thereby produce the square-wave signal (ac power frequency is 50HZ) of a peak value 5V frequency 50HZ; If AC motor 11 open circuit faults, then as: export a high level one, 2).Thereby as seen: under holding state, the motor test side detects the square-wave signal of a peak value 5V frequency 50HZ, shows that motor is normal, can start at any time; The motor test side detects then motor open fault of high level, and machine will not enter normal start-up routine.
Therefore this example is finished the control and the fault verification of motor by motor control circuit and combining of motor testing circuit, and during detection, the high-low level by the motor test side changes whether judge motor failure, and is simple to operate, reliable.
Claims (3)
1. motor control and detection circuit of forced-exhaust gas water heater, comprise a motor control circuit (1) and a motor testing circuit (2), described motor control circuit (1) has a motor pwm signal output circuit, it is characterized in that: described motor control circuit (1) also comprises an AC motor (11), one controllable silicon controller (TR1), one resistance (R3), electric capacity (C21) and resistance (R4), described electric capacity (C21) and resistance (R4) serial connection, and circuit two ends and described controllable silicon controller (TR1) two links after electric capacity (C21) and resistance (R4) serial connection also connect, AC motor (11) input end is electrically connected with 220V AC power one end, controllable silicon controller (TR1) two links are connected in series with AC motor (11) output terminal and described motor testing circuit (2) input end respectively, this controllable silicon controller (TR1) Enable Pin is electrically connected with described motor pwm signal output circuit output terminal, and described resistance (R3) two ends are connected in series with motor PWM output circuit output terminal and motor testing circuit (2) input end respectively; Described motor testing circuit (2) comprises a diode group (21), one photo-coupler (LA), one triode (DQ5) and resistance (R1), described diode group (21) input end is connected in series with described motor control circuit (1) output terminal, this diode group (21) output terminal is electrically connected with the 220V AC power other end, described resistance (R1) end is connected in series with photo-coupler (LA) input end, resistance (R1) other end and another input end of photo-coupler (LA) are respectively with described diode group (21) two ends and connect, the output terminal of described photo-coupler (LA) is electrically connected with described triode (DQ5) base terminal, this triode (DQ5) emitter terminal ground connection and collector terminal are electrically connected with+5V power supply, the collector terminal of described triode (DQ5) externally transmits the motor test side of signal as this testing circuit, described diode group (21) comprises the reverse diode (D3) that is connected that forward connects diode (D2) and a plurality of serial connections, and this forward connection diode (D2) and these a plurality of serial connections reverse is connected between diode (D3) and connects.
2. motor control and detection circuit of forced-exhaust gas water heater according to claim 1, it is characterized in that: the diode group (21) of described motor testing circuit (2) comprises the reverse diode (D3) that is connected that forward connects diode (D2) and three serial connections, and this forward connection diode (D2) and these three serial connections reverse is connected between diode (D3) and connects.
3. motor control and detection circuit of forced-exhaust gas water heater according to claim 1 is characterized in that: the electrochemical capacitor (E4) that is connected in series a filtering AC noise between the motor test side of described motor testing circuit (2) and ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102358720A CN101762780B (en) | 2008-11-10 | 2008-11-10 | Motor control and detection circuit of forced-exhaust gas water heater |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102358720A CN101762780B (en) | 2008-11-10 | 2008-11-10 | Motor control and detection circuit of forced-exhaust gas water heater |
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| Publication Number | Publication Date |
|---|---|
| CN101762780A true CN101762780A (en) | 2010-06-30 |
| CN101762780B CN101762780B (en) | 2013-05-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008102358720A Active CN101762780B (en) | 2008-11-10 | 2008-11-10 | Motor control and detection circuit of forced-exhaust gas water heater |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108490352A (en) * | 2018-03-15 | 2018-09-04 | 广州飞机维修工程有限公司 | A kind of Boeing-737 NG aircrafts wiper motor automatic fault diagnosis device |
| CN109188268A (en) * | 2018-07-13 | 2019-01-11 | 广东瑞德智能科技股份有限公司 | A kind of modified low cost motor open circuit detecting device |
| CN109268911B (en) * | 2018-09-26 | 2020-10-09 | 珠海格力电器股份有限公司 | Water shortage detection circuit and household appliance |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2472239Y (en) * | 2001-03-16 | 2002-01-16 | 何霞 | Detecter for high voltage cutoff |
| CN201118512Y (en) * | 2007-10-19 | 2008-09-17 | 深圳和而泰智能控制股份有限公司 | Speed-adjusting motor torque compensation circuit |
| CN201238282Y (en) * | 2008-07-23 | 2009-05-13 | 樱花卫厨（中国）股份有限公司 | Motor control detection circuit for forced-ventilation type gas water heater |
-
2008
- 2008-11-10 CN CN2008102358720A patent/CN101762780B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2472239Y (en) * | 2001-03-16 | 2002-01-16 | 何霞 | Detecter for high voltage cutoff |
| CN201118512Y (en) * | 2007-10-19 | 2008-09-17 | 深圳和而泰智能控制股份有限公司 | Speed-adjusting motor torque compensation circuit |
| CN201238282Y (en) * | 2008-07-23 | 2009-05-13 | 樱花卫厨（中国）股份有限公司 | Motor control detection circuit for forced-ventilation type gas water heater |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108490352A (en) * | 2018-03-15 | 2018-09-04 | 广州飞机维修工程有限公司 | A kind of Boeing-737 NG aircrafts wiper motor automatic fault diagnosis device |
| CN108490352B (en) * | 2018-03-15 | 2024-01-09 | 广州飞机维修工程有限公司 | Automatic diagnosis device for faults of wave tone 737NG aircraft wiper motor |
| CN109188268A (en) * | 2018-07-13 | 2019-01-11 | 广东瑞德智能科技股份有限公司 | A kind of modified low cost motor open circuit detecting device |
| CN109268911B (en) * | 2018-09-26 | 2020-10-09 | 珠海格力电器股份有限公司 | Water shortage detection circuit and household appliance |
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| Publication number | Publication date |
|---|---|
| CN101762780B (en) | 2013-05-22 |
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