CN1141058C - Soft starter for motor of dust collector - Google Patents
Soft starter for motor of dust collector Download PDFInfo
- Publication number
- CN1141058C CN1141058C CNB991272412A CN99127241A CN1141058C CN 1141058 C CN1141058 C CN 1141058C CN B991272412 A CNB991272412 A CN B991272412A CN 99127241 A CN99127241 A CN 99127241A CN 1141058 C CN1141058 C CN 1141058C
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- circuit
- triode thyristor
- bidirectional triode
- motor
- output
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Abstract
The present invention relates to a soft starting device for a motor of a suction cleaner, which is characterized in that the present invention comprises a first starting circuit, a second starting circuit, a power circuit and a logic control circuit. When a motor is started, the first starting circuit operates firstly, so an angle of flow of a bidirectional thyristor TR3 can be smaller; thus, the motor can be speeded up from a zero rotating speed to a low rotating speed set by an R5 and a C5; after a delay, the rotating speed of the motor reaches the set low speed, the first starting circuit is switched off, and the second starting circuit is put into service; the motor is speeded up to the rotating speed when in normal operation. Because the motor is speeded up step by step in two steps when started, the starting current is small at the time of the starting.
Description
The present invention relates to a kind of motor starting device of dust catcher.
In the prior art, motor starting device on the dust catcher as shown in Figure 2, W1 is used to regulate rotating speed of motor, the product of C5, (R6+W1) has determined the angle of flow of TR3, because W1 may be arranged at the maximum (top) speed position when starting, therefore motor directly quickens to maximum speed from zero rotating speed, transient voltage when it starts falls maximum greater than 5.23% of supply voltage, voltage during stable state falls also greater than 3.99% of supply voltage, does not meet the electromagnetic compatibility requirement of many in the world countries to household electrical appliance.
Even when the object of the present invention is to provide a kind of manual governing potentiometer to be positioned over maximum (top) speed, its starting resistor falls the soft starter for motor device of all less dust catcher.
Technical scheme of the present invention is: a kind of soft starter for motor device of dust catcher, it comprises
First start-up circuit, it is in series and is formed by capacitor C 5, resistance R 5, the first bidirectional triode thyristor TR1;
Second start-up circuit, it is in series and is formed by capacitor C 5, resistance R 6, adjustable resistance W1, the second bidirectional triode thyristor TR2;
Motor circuit, it is in series by motor M, bidirectional triode thyristor TR3 and forms also cross-over connection in the AC power two ends;
Logic control circuit, the control that the control that its first output control terminal is connected on the described first bidirectional triode thyristor TR1 is extremely gone up, second output control terminal is connected on the described second bidirectional triode thyristor TR2 is extremely gone up;
The two ends cross-over connection of described first start-up circuit and second start-up circuit in the two ends of described motor circuit or cross-over connection in the two ends of described bidirectional triode thyristor TR3;
Described logic control circuit has two such output control terminals: when described motor circuit is applied alternating voltage, high potential of first output control terminal of described logic control circuit output makes described bidirectional triode thyristor TR1 conducting, and this moment described logic control circuit electronegative potential of second output control terminal output make described bidirectional triode thyristor TR2 end; After time-delay, electronegative potential of first output control terminal of described logic control circuit output makes described bidirectional triode thyristor TR1 end, and high potential of second output control terminal of described logic control circuit output makes described bidirectional triode thyristor TR2 conducting;
One end of described capacitor C 5 connects the utmost point of bidirectional trigger diode DB, and another utmost point of this bidirectional trigger diode DB is connected to the control of described bidirectional triode thyristor TR3 and extremely goes up.
The present invention compared with prior art has following advantage:
Because elder generation is by the first start-up circuit work during electric motor starting, therefore the angle of flow of bidirectional triode thyristor TR3 is less, motor is quickened to the slow-speed of revolution of being set by R5 and C5 from zero rotating speed earlier, after the time-delay, motor speed reaches the slow-speed of revolution of described setting substantially, first start-up circuit is switched, and second start-up circuit comes into operation, make the rotating speed of described motor when operate as normal quicken, because electric motor starting is divided into two-stage and progressively goes on foot acceleration, starting current when therefore starting is little, after measured, it is about 2.2% that the transient voltage when it starts falls maximum, and it is 1.06% that the voltage during stable state falls, meet electromagnetic compatibility requirement to home appliance, little to the influence of electrical network.
The invention will be further described below in conjunction with drawings and Examples:
Accompanying drawing 1 is the circuit theory diagrams of the first embodiment of the present invention;
Accompanying drawing 2 is the circuit theory diagrams of the electric motor starting circuit of prior art;
Accompanying drawing 3 is the circuit theory diagrams of the second embodiment of the present invention;
Accompanying drawing 4 is the circuit theory diagrams of the third embodiment of the present invention;
Embodiment: a kind of soft starter for motor device of dust catcher, it comprises:
First start-up circuit, it is in series and is formed by capacitor C 5, resistance R 5, the first bidirectional triode thyristor TR1;
Second start-up circuit, it is in series and is formed by capacitor C 5, resistance R 6, adjustable resistance W1, the second bidirectional triode thyristor TR2;
Motor circuit, it is in series by motor M, bidirectional triode thyristor TR3 and forms also cross-over connection in the AC power two ends;
Logic control circuit, the control that the control that its first output control terminal is connected on the described first bidirectional triode thyristor TR1 is extremely gone up, second output control terminal is connected on the described second bidirectional triode thyristor TR2 is extremely gone up;
The two ends cross-over connection of described first start-up circuit and second start-up circuit in the two ends of described motor circuit or cross-over connection in the two ends of described bidirectional triode thyristor TR3;
Described logic control circuit has two such output control terminals: when described motor circuit is applied alternating voltage, high potential of first output control terminal of described logic control circuit output makes described bidirectional triode thyristor TR1 conducting, and this moment described logic control circuit electronegative potential of second output control terminal output make described bidirectional triode thyristor TR2 end; After time-delay, electronegative potential of first output control terminal of described logic control circuit output makes described bidirectional triode thyristor TR1 end, and high potential of second output control terminal of described logic control circuit output makes described bidirectional triode thyristor TR2 conducting;
One end of described capacitor C 5 connects the utmost point of bidirectional trigger diode DB, and another utmost point of this bidirectional trigger diode DB is connected to the control of described bidirectional triode thyristor TR3 and extremely goes up.The first anode of the first bidirectional triode thyristor TR1 on described first start-up circuit terminates at the second plate end of the bidirectional triode thyristor TR3 on the described motor circuit, and the other end of the capacitor C 5 on described first start-up circuit is connected on the first anode end of described bidirectional triode thyristor TR3 or the other end of motor circuit.The first anode of the second bidirectional triode thyristor TR2 on described second start-up circuit terminates at the second plate end of the bidirectional triode thyristor TR3 on the described motor circuit.
Referring to accompanying drawing 1, AC power becomes low-voltage AC through capacitor C 1, transformer B1, become low-voltage DC through bridge rectifier D1 to D4 and filter capacitor C2 again, supply with IC 1 (model is 555, its each pin order number referring to corresponding integrated pin explanation) and triode BG1 use.Capacitor C 3 in the accompanying drawing 1, resistance R 1, capacitor C 4, ic chip 1, resistance R 2, resistance R 3, resistance R 4, triode BG1 form described logic control circuit.When just powering up, the 2nd pin of IC1 and the 6th pin are electronegative potential, and the 3rd pin output high potential, the 7th pin are in and the ground off-state.Dc source is extremely gone up by the control that R2 output high potential is added to silicon symmetrical switch TR1, makes the TR1 conducting.Capacitor C 5 is charged to a certain degree by R5 and TR1 charging, and bidirectional trigger diode DB conducting produces the control utmost point of pulse to bidirectional triode thyristor TR3, makes bidirectional triode thyristor TR3 conducting, so motor M is connected.The conduction angle of TR3 when the product of R5 and C5 has determined to start, i.e. the motor slow-speed of revolution of She Dinging.Transient voltage fell maximum and is no more than standard when the selection of the value of R5 and C5 required to start.On the other hand, the 3rd pin of IC1 is a high potential, BG1 is satisfied close conducting, and the current collection of BG1 is electronegative potential very, so TR2 is obstructed.The charging current of C5 is without resistance R 6, manual governing potentiometer W1, TR2.Power up afterwards along with C3 charges gradually by R1,2 pin of IC1 and the current potential of 6 pin progressively improve, and (delay time about 0.5 second to 2.5 seconds) when being raised to greater than 2/3 supply voltage, and the conversion of IC1 state: the 7th pin and the 3rd pin of IC1 all become electronegative potential, make TR1 disconnect the TR2 conducting.C5 is by R6, W1, TR2 charging, with the conduction angle of control TR3.Manual adjustments W1 can regulate motor speed.First output control terminal of described logic control circuit is the 7th pin of IC1, and second output control terminal of described logic control circuit is the colelctor electrode of BG1.
Referring to accompanying drawing 3, described first start-up circuit is in series by C5, R5, TR1, second start-up circuit is in series by capacitor C 6, R6, W1, TR2, makes two start-up circuits use an electric capacity separately and is different from two shared electric capacity of start-up circuit in the accompanying drawing 1.The capacitance terminal of two start-up circuits connects a bidirectional trigger diode DB1 and DB2 respectively simultaneously.Circuit shown in the accompanying drawing 3 is that the equivalence of circuit shown in the accompanying drawing 1 is replaced.
Referring to accompanying drawing 4, this accompanying drawing provides another kind of logic control circuit, and the model of the IC2 in the accompanying drawing 4 is a NAND gate 4011, has used two triode BG1 and BG2.When just powering up, 5 pin of IC2 are high potentials, and 6 pin are electronegative potentials, and therefore 4 pin are high potentials.So just make BG1 be in saturation state, the colelctor electrode of BG1 is an electronegative potential, and it makes not conducting of TR2.The electronegative potential of BG1 colelctor electrode ends BG2, and the colelctor electrode of BG2 is a high potential, and power supply makes the TR1 conducting by the control utmost point power supply of resistance TR1.C5 by R5, TR1, charge, make motor be in the low-power starting state.Power supply charges to C3 through R1, when the voltage on the C3 is raised to (after delaying time 2 seconds) when being equivalent to high potential, 5 pin of IC2 and 6 pin all are high potentials, its 4 pin becomes electronegative potential, at this moment BG1 is in cut-off state, the colelctor electrode of BG1 is a high potential, power supply is by the control utmost point power supply of resistance to TR2, make the TR2 conducting, simultaneously the high potential of BG1 colelctor electrode makes BG2 be in saturation state, and the current collection that makes BG2 is electronegative potential very, therefore makes not conducting of TR1, C5 is by R6 and W1 and TR2 charging, and motor changes normal manual state over to.
Claims (1)
1, a kind of soft starter for motor device of dust catcher, it is characterized in that: it comprises
First start-up circuit, it is in series and is formed by capacitor C 5, resistance R 5, the first bidirectional triode thyristor TR1;
Second start-up circuit, it is in series and is formed by capacitor C 5, resistance R 6, adjustable resistance W1, the second bidirectional triode thyristor TR2;
Motor circuit, it is in series by motor M, bidirectional triode thyristor TR3 and forms also cross-over connection in the AC power two ends;
Logic control circuit, the control that its first output control terminal is connected on the described first bidirectional triode thyristor TR1 is extremely gone up, and second output control terminal is connected on the control of the described second bidirectional triode thyristor TR2 and extremely goes up;
The two ends cross-over connection of described first start-up circuit and second start-up circuit in the two ends of described motor circuit or cross-over connection in the two ends of described bidirectional triode thyristor TR3;
Described logic control circuit has two such output control terminals: when described motor circuit is applied alternating voltage, high potential of first output control terminal of described logic control circuit output makes described bidirectional triode thyristor TR1 conducting, and this moment described logic control circuit electronegative potential of second output control terminal output make described bidirectional triode thyristor TR2 end; After time-delay, electronegative potential of first output control terminal of described logic control circuit output makes described bidirectional triode thyristor TR1 end, and high potential of second output control terminal of described logic control circuit output makes described bidirectional triode thyristor TR2 conducting;
One end of described capacitor C 5 connects the utmost point of bidirectional trigger diode DB, and another utmost point of this bidirectional trigger diode DB is connected to the control of described bidirectional triode thyristor TR3 and extremely goes up;
The first anode of the first bidirectional triode thyristor TR1 on described first start-up circuit terminates at the second plate end of the bidirectional triode thyristor TR3 on the described motor circuit, and the other end of the capacitor C 5 on described first start-up circuit is connected on the first anode end of described bidirectional triode thyristor TR3 or the other end of motor circuit;
The first anode of the second bidirectional triode thyristor TR2 on described second start-up circuit terminates at the second plate end of the bidirectional triode thyristor TR3 on the described motor circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB991272412A CN1141058C (en) | 1999-12-30 | 1999-12-30 | Soft starter for motor of dust collector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB991272412A CN1141058C (en) | 1999-12-30 | 1999-12-30 | Soft starter for motor of dust collector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1301522A CN1301522A (en) | 2001-07-04 |
| CN1141058C true CN1141058C (en) | 2004-03-10 |
Family
ID=5284829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB991272412A Expired - Fee Related CN1141058C (en) | 1999-12-30 | 1999-12-30 | Soft starter for motor of dust collector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1141058C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100424991C (en) * | 2004-09-27 | 2008-10-08 | 乐金电子(天津)电器有限公司 | Drive circuit for rotating resonance type motor |
-
1999
- 1999-12-30 CN CNB991272412A patent/CN1141058C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1301522A (en) | 2001-07-04 |
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