CN204947943U - The startup control device of electrical cooking appliance and motor thereof - Google Patents
The startup control device of electrical cooking appliance and motor thereof Download PDFInfo
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- CN204947943U CN204947943U CN201520737363.3U CN201520737363U CN204947943U CN 204947943 U CN204947943 U CN 204947943U CN 201520737363 U CN201520737363 U CN 201520737363U CN 204947943 U CN204947943 U CN 204947943U
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Abstract
The utility model discloses the startup control device of motor in a kind of electrical cooking appliance, comprising: zero cross detection circuit, zero cross detection circuit detects the zero crossing of external communication mains supply; Gate-controlled switch device, gate-controlled switch device is connected with motor, and the gate-controlled switch device of series connection is connected with external communication mains supply with motor; Motor-drive circuit, motor-drive circuit turns on and off with drive motors by control gate-controlled switch device; Power circuit; Governor circuit, governor circuit comprises timer and main control chip, timer starts timing to obtain delay time at zero crossing, main control chip is by controlling delay time to control the start time of motor-drive circuit output drive signal, start from scratch to make the rotating speed of motor and increase step by step, until reach rotating speed of target.The impact that this device effectively can reduce the unexpected high-speed starting of motor and cause, vibrations and noise.The invention also discloses a kind of electrical cooking appliance.
Description
Technical field
The utility model relates to household electrical appliance technical field, particularly the startup control device of motor and a kind of electrical cooking appliance in a kind of electrical cooking appliance.
Background technology
Usually, the input voltage of motor is controlled by switching device, when motor needs to start, makes motor directly start full power operation by control switch device, or according to difference in functionality demand, by control switch device, motor is directly operated according to required specific rotation speeds.Although aforesaid way can make the rotating speed of motor reach required rotating speed very soon, when needed for motor, rotating speed is higher, operate with required higher rotation speed if directly control motor from inactive state, then greater impact can be produced, cause complete machine to shake large, and produce larger noise, affect overall performance.
Utility model content
The utility model is intended to solve one of technical problem in correlation technique at least to a certain extent.For this reason, an object of the present utility model be to propose a kind of effectively can reduce the unexpected high-speed starting of motor and cause impact, vibrations and noise electrical cooking appliance in the startup control device of motor.
Another object of the present utility model is to propose a kind of electrical cooking appliance.
For achieving the above object, the utility model proposes the startup control device of motor in a kind of electrical cooking appliance on the one hand, comprise: zero cross detection circuit, described zero cross detection circuit is connected the zero crossing detecting described external communication mains supply with external communication mains supply; Gate-controlled switch device, described gate-controlled switch device is connected with described motor, and the gate-controlled switch device of series connection is connected with described external communication mains supply with motor; Motor-drive circuit, described motor-drive circuit is connected with the control end of described gate-controlled switch device, described motor-drive circuit by control described gate-controlled switch device turn on and off drive described motor; Power circuit, described power circuit is connected with described external communication mains supply, and the electric main that described external communication mains supply exports is converted to the direct current of predeterminated voltage by described power circuit; Governor circuit, described governor circuit is connected with described power circuit with described zero cross detection circuit, described motor-drive circuit respectively, described governor circuit comprises timer and main control chip, described timer starts timing to obtain delay time at described zero crossing, described main control chip is by controlling described delay time to control the start time of described motor-drive circuit output drive signal, start from scratch to make the rotating speed of described motor and increase step by step, until reach rotating speed of target.
According to the startup control device of motor in electrical cooking appliance of the present utility model, when external communication mains supply zero crossing, timer starts timing to obtain delay time, main control chip is by controlling delay time to control the start time of motor-drive circuit output drive signal, start from scratch to make the rotating speed of motor and increase step by step, until reach rotating speed of target, thus make motor realize smooth starting, effectively reduce the unexpected high-speed starting of motor and cause impact, vibrations and noise.
Particularly, the first end of described gate-controlled switch device is connected with the zero line side of described external communication mains supply, second end of described gate-controlled switch device is connected with one end of described motor, and the other end of described motor is connected with the live wire end of described external communication mains supply.
Further, described gate-controlled switch device is controllable silicon.
Particularly, described delay time shortens gradually under the control of described main control chip.
Particularly, the startup control device of motor in above-mentioned electrical cooking appliance, also comprise the speed feedback circuit of Real-time Feedback motor speed, described speed feedback circuit is connected with described main control chip, wherein, described main control chip controls described delay time according to the motor speed of described speed feedback circuit Real-time Feedback.
For achieving the above object, the utility model proposes a kind of electrical cooking appliance on the other hand, and it comprises the startup control device of motor in above-mentioned electrical cooking appliance.
Electrical cooking appliance of the present utility model is by the startup control device of motor in above-mentioned electrical cooking appliance, motor can be made to realize smooth starting, the unexpected high-speed starting of effective reduction motor and the impact caused, vibrations and noise, thus improve complete machine useful life and overall performance, improve Consumer's Experience.
Accompanying drawing explanation
Fig. 1 is the block diagram of the startup control device of motor in the electrical cooking appliance according to the utility model embodiment.
Fig. 2 is the working waveform figure of the motor according to the utility model embodiment.
Fig. 3 is the block diagram of the startup control device of motor in the electrical cooking appliance according to another embodiment of the utility model.
Fig. 4 is the flow chart of the startup control method of motor in the electrical cooking appliance according to the utility model embodiment.
Embodiment
Be described below in detail embodiment of the present utility model, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the utility model, and can not be interpreted as restriction of the present utility model.
The startup control method of motor in the startup control device of motor in the electrical cooking appliance proposed according to the utility model embodiment, electrical cooking appliance and electrical cooking appliance is described with reference to the accompanying drawings.
Fig. 1 is the block diagram of the startup control device of motor in the electrical cooking appliance according to the utility model embodiment, and wherein, electrical cooking appliance can be soy bean milk making machine, juice extractor etc.As shown in Figure 1, in this electrical cooking appliance, the startup control device of motor comprises: zero cross detection circuit 10, gate-controlled switch device 20, motor-drive circuit 30, governor circuit 40 and power circuit 50.
Wherein, zero cross detection circuit 10 is connected with external communication mains supply the zero crossing detecting external communication mains supply, gate-controlled switch device 20 is connected with motor M, the gate-controlled switch device 20 of series connection is connected with external communication mains supply with motor M, motor-drive circuit 30 is connected with the control end of gate-controlled switch device 20, motor-drive circuit 30 turns on and off with drive motors M by control gate-controlled switch device 20, power circuit 50 is connected with external communication mains supply, the electric main that external communication mains supply exports is converted to the direct current of predeterminated voltage by power circuit 50, governor circuit 40 respectively with zero cross detection circuit 10, motor-drive circuit 30 is connected with power circuit 50, governor circuit 40 comprises timer and main control chip, timer starts timing to obtain delay time at zero crossing, main control chip 40 is by controlling delay time to control the start time of motor-drive circuit 30 output drive signal, start from scratch to make the rotating speed of motor M and increase step by step, until reach rotating speed of target.Predeterminated voltage can be demarcated according to actual conditions.
According to an embodiment of the present utility model, the first end of gate-controlled switch device 20 is connected with the zero line side N of external communication mains supply, second end of gate-controlled switch device 20 is connected with one end of motor M, and the other end of motor M is connected with the live wire end L of external communication mains supply.Wherein, gate-controlled switch device 20 is controllable silicon.
Particularly, the input voltage of motor is controlled by switching device, when motor needs to start, motor is made directly to start full power operation by control switch device, or according to the demand of certain menu function, the periodic waveform of opening-turn off exporting required specific rotation speeds corresponding carrys out control switch device, directly operates according to required specific rotation speeds to make motor.Although aforesaid way can make the rotating speed of motor reach required rotating speed very soon, but when needed for motor, rotating speed is higher, if directly control motor from inactive state to operate with required higher rotation speed, then greater impact can be produced, complete machine is caused to shake large, and produce larger noise, affect overall performance, thus affect Consumer's Experience.
In order to effectively reduce in motor start-up procedure, because motor directly runs up brought impact and noise, in embodiment of the present utility model, controlled by the input voltage of each zero crossing place to motor M at outside AC mains, start from scratch to enable the rotating speed of motor M and increase step by step, until reach rotating speed of target, thus realize the mild startup of motor M.
Specifically, as shown in Figure 2, suppose that the rotating speed of target of motor M is V, after motor M starts startup, zero cross detection circuit 10 detects the zero crossing of external communication mains supply in real time and transfers to governor circuit 40, and the timer in governor circuit 40 starts timing at zero crossing place, when timing time reaches the first set point t1, main control chip in governor circuit 40 controls motor-drive circuit 30 output drive signal and operates with drive motors M to gate-controlled switch device 20, and now the rotating speed of motor M is V1.When zero cross detection circuit 10 detects next zero crossing, timer starts reclocking again, when timing time reaches the second set point t2, main control chip controls motor-drive circuit 30 output drive signal again and operates with drive motors M to gate-controlled switch device 20, now the rotating speed of motor M is V2, circulate successively, until the rotating speed of motor reaches rotating speed of target V.
That is, in motor start-up procedure, by each the zero crossing place at outside AC mains, control according to the start-up time of speed demand to the drive singal that motor-drive circuit 30 exports, to enable the rotating speed of motor from V1-V2-V3-... Vn progressively rises to rotating speed of target V, wherein, V1 < V2 < V3 < ... Vn and n is positive integer, achieve the mild startup of motor, effectively prevent the impact that the unexpected high-speed starting of motor produces, vibrations and noise, improve useful life and the performance of complete machine.
According to an embodiment of the present utility model, delay time shortens gradually under the control of main control chip.Be understandable that, when the cycle of the drive singal that motor-drive circuit 30 exports is constant, the service time of gate-controlled switch device 20 is longer, and motor speed is higher, and therefore delay time is shorter.
According to an embodiment of the present utility model, as shown in Figure 3, above-mentioned startup control device also comprises the speed feedback circuit 60 of Real-time Feedback motor speed, speed feedback circuit 60 is connected with main control chip, wherein, main control chip controls delay time according to the motor M rotating speed of speed feedback circuit 60 Real-time Feedback.
Particularly, in motor start-up procedure, zero cross detection circuit 10 detects the zero crossing of external communication mains supply in real time, timer starts timing when zero crossing being detected, the current rotating speed of feedback circuit 60 Real-time Feedback motor M simultaneously, main control chip obtains according to the current rotating speed of rotating speed of target and motor M the delay time preset, and after the delay time that the timing time of timer reaches default, control motor-drive circuit 30 output drive signal to gate-controlled switch device 20, operate with drive motors, the rotating speed of motor is made to be increased to rotating speed of target gradually from zero, realize mild startup.Be understandable that, the delay time preset can obtain according to delay time-rate curve, also can calculate according to current rotating speed and rotating speed of target.
In sum, timing is started to obtain delay time according to the startup control device of motor in the electrical cooking appliance of the utility model embodiment timer when external communication mains supply zero crossing, main control chip is by controlling delay time to control the start time of motor-drive circuit output drive signal, start from scratch to make the rotating speed of motor and increase step by step, until reach rotating speed of target, thus make motor realize smooth starting, effectively reduce the unexpected high-speed starting of motor and cause impact, vibrations and noise.
In addition, embodiment of the present utility model also proposed a kind of electrical cooking appliance, and it comprises the startup control device of motor in above-mentioned electrical cooking appliance, and wherein, electrical cooking appliance can be soy bean milk making machine, juice extractor etc.
The electrical cooking appliance of the utility model embodiment is by above-mentioned startup control device, motor can be made to realize smooth starting, the unexpected high-speed starting of effective reduction motor and cause impact, vibrations and noise, thus improve complete machine useful life and overall performance, improve Consumer's Experience.
Fig. 4 is the flow chart of the startup control method of motor in the electrical cooking appliance according to the utility model embodiment, wherein, the gate-controlled switch device that electrical cooking appliance comprises zero cross detection circuit, connect with motor, the motor-drive circuit be connected with the control end of gate-controlled switch device, the gate-controlled switch device of series connection is connected with external communication mains supply with motor, and motor-drive circuit is turned on and off by control gate-controlled switch device with drive motors.
As shown in Figure 4, in this electrical cooking appliance, the startup control method of motor comprises the following steps:
S1, detects the zero crossing of external communication mains supply by zero cross detection circuit.
S2, starts timing to obtain delay time at zero crossing, and by controlling delay time to control the start time of motor-drive circuit output drive signal, starting from scratch increase step by step, until reach rotating speed of target to make the rotating speed of motor.
Particularly, the input voltage of motor is controlled by switching device, when motor needs to start, motor is made directly to start full power operation by control switch device, or according to the demand of certain menu function, the periodic waveform of opening-turn off exporting required specific rotation speeds corresponding carrys out control switch device, directly operates according to required specific rotation speeds to make motor.Although aforesaid way can make the rotating speed of motor reach required rotating speed very soon, but when needed for motor, rotating speed is higher, if directly control motor from inactive state to operate with required higher rotation speed, then greater impact can be produced, complete machine is caused to shake large, and produce larger noise, affect overall performance, thus affect Consumer's Experience.
In order to effectively reduce in motor start-up procedure, because motor directly runs up brought impact and noise, in embodiment of the present utility model, controlled by the input voltage of each zero crossing place to motor at outside AC mains, start from scratch to enable the rotating speed of motor and increase step by step, until reach rotating speed of target, thus realize the mild startup of motor.
Specifically, as shown in Figure 2, suppose that the rotating speed of target of motor is V, after motor starts startup, zero cross detection circuit detects the zero crossing of external communication mains supply in real time, and starts timing when zero cross detection circuit detects zero crossing, when timing time reaches the first set point t1, control motor-drive circuit output drive signal to operate to gate-controlled switch device with drive motors, now the rotating speed of motor is V1.When zero cross detection circuit detects next zero crossing, start reclocking again, when timing time reaches the second set point t2, control motor-drive circuit output drive signal again to operate to gate-controlled switch device with drive motors, now the rotating speed of motor is V2, circulate successively, until the rotating speed of motor reaches rotating speed of target V.
That is, in motor start-up procedure, by each the zero crossing place at outside AC mains, control according to the start-up time of speed demand to the drive singal that motor-drive circuit exports, to enable the rotating speed of motor from V1-V2-V3-... Vn progressively rises to rotating speed of target V, wherein, V1 < V2 < V3 < ... Vn and n is positive integer, achieve the mild startup of motor, effectively prevent the impact that the unexpected high-speed starting of motor produces, vibrations and noise, improve useful life and the performance of complete machine.
According to an embodiment of the present utility model, the rotating speed of delay time and motor is inverse correlation relation.Be understandable that, when the cycle of the drive singal that motor-drive circuit exports is constant, the service time of gate-controlled switch device is longer, and motor speed is higher, and therefore delay time is shorter.
According to an embodiment of the present utility model, above-mentioned startup control method also comprises: by speed feedback circuit Real-time Feedback motor speed; Motor speed according to speed feedback circuit Real-time Feedback controls delay time.
Particularly, in motor start-up procedure, zero cross detection circuit detects the zero crossing of external communication mains supply in real time, and start timing when zero crossing being detected, the current rotating speed of feedback circuit Real-time Feedback motor simultaneously, main control chip obtains according to the current rotating speed of rotating speed of target and motor the delay time preset, and after the delay time that timing time reaches default, control motor-drive circuit output drive signal to operate to gate-controlled switch device with drive motors, make the rotating speed of motor be increased to rotating speed of target gradually from zero, realize starting gently.Be understandable that, the delay time preset can obtain according to delay time-rate curve, also can calculate according to current rotating speed and rotating speed of target.
According to the startup control method of motor in the electrical cooking appliance of the utility model embodiment, timing is started to obtain delay time when external communication mains supply zero crossing, and by controlling delay time to control the start time of motor-drive circuit output drive signal, start from scratch to make the rotating speed of motor and increase step by step, until reach rotating speed of target, thus make motor realize smooth starting, effectively reduce the unexpected high-speed starting of motor and cause impact, vibrations and noise.
In description of the present utility model, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", " counterclockwise ", " axis ", " radial direction ", orientation or the position relationship of the instruction such as " circumference " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction of the present utility model.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise at least one this feature.In description of the present utility model, the implication of " multiple " is at least two, such as two, three etc., unless otherwise expressly limited specifically.
In the utility model, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements, unless otherwise clear and definite restriction.For the ordinary skill in the art, the concrete meaning of above-mentioned term in the utility model can be understood as the case may be.
In the utility model, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary indirect contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " can be fisrt feature immediately below second feature or tiltedly below, or only represent that fisrt feature level height is less than second feature.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present utility model or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this specification or example and different embodiment or example can carry out combining and combining by those skilled in the art.
Although illustrate and described embodiment of the present utility model above, be understandable that, above-described embodiment is exemplary, can not be interpreted as restriction of the present utility model, those of ordinary skill in the art can change above-described embodiment, revises, replace and modification in scope of the present utility model.
Claims (6)
1. the startup control device of motor in electrical cooking appliance, is characterized in that, comprising:
Zero cross detection circuit, described zero cross detection circuit is connected the zero crossing detecting described external communication mains supply with external communication mains supply;
Gate-controlled switch device, described gate-controlled switch device is connected with described motor, and the gate-controlled switch device of series connection is connected with described external communication mains supply with motor;
Motor-drive circuit, described motor-drive circuit is connected with the control end of described gate-controlled switch device, described motor-drive circuit by control described gate-controlled switch device turn on and off drive described motor;
Power circuit, described power circuit is connected with described external communication mains supply, and the electric main that described external communication mains supply exports is converted to the direct current of predeterminated voltage by described power circuit;
Governor circuit, described governor circuit is connected with described power circuit with described zero cross detection circuit, described motor-drive circuit respectively, described governor circuit comprises timer and main control chip, described timer starts timing to obtain delay time at described zero crossing, described main control chip is by controlling described delay time to control the start time of described motor-drive circuit output drive signal, start from scratch to make the rotating speed of described motor and increase step by step, until reach rotating speed of target.
2. the startup control device of motor in electrical cooking appliance according to claim 1, it is characterized in that, the first end of described gate-controlled switch device is connected with the zero line side of described external communication mains supply, second end of described gate-controlled switch device is connected with one end of described motor, and the other end of described motor is connected with the live wire end of described external communication mains supply.
3. the startup control device of motor in electrical cooking appliance according to claim 1 and 2, it is characterized in that, described gate-controlled switch device is controllable silicon.
4. the startup control device of motor in electrical cooking appliance according to claim 1, it is characterized in that, described delay time shortens gradually under the control of described main control chip.
5. the startup control device of motor in electrical cooking appliance according to claim 1, it is characterized in that, also comprise the speed feedback circuit of Real-time Feedback motor speed, described speed feedback circuit is connected with described main control chip, wherein, described main control chip controls described delay time according to the motor speed of described speed feedback circuit Real-time Feedback.
6. an electrical cooking appliance, is characterized in that, comprises the startup control device of motor in the electrical cooking appliance according to any one of claim 1-5.
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| CN201520737363.3U CN204947943U (en) | 2015-09-22 | 2015-09-22 | The startup control device of electrical cooking appliance and motor thereof |
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| CN201520737363.3U CN204947943U (en) | 2015-09-22 | 2015-09-22 | The startup control device of electrical cooking appliance and motor thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107233013A (en) * | 2016-03-28 | 2017-10-10 | 广东美的生活电器制造有限公司 | Control method, device and the cooking machine of cooking machine |
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- 2015-09-22 CN CN201520737363.3U patent/CN204947943U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107233013A (en) * | 2016-03-28 | 2017-10-10 | 广东美的生活电器制造有限公司 | Control method, device and the cooking machine of cooking machine |
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