CN109347401B - Motor rotation speed control device, motor and food processing equipment - Google Patents
Motor rotation speed control device, motor and food processing equipment Download PDFInfo
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- CN109347401B CN109347401B CN201811326753.6A CN201811326753A CN109347401B CN 109347401 B CN109347401 B CN 109347401B CN 201811326753 A CN201811326753 A CN 201811326753A CN 109347401 B CN109347401 B CN 109347401B
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- 238000012545 processing Methods 0.000 title claims abstract description 13
- 239000003990 capacitor Substances 0.000 claims abstract description 43
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 30
- 230000007613 environmental effect Effects 0.000 claims description 2
- 238000012937 correction Methods 0.000 abstract description 9
- 230000000630 rising effect Effects 0.000 description 10
- 230000006698 induction Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 230000007423 decrease Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/60—Controlling or determining the temperature of the motor or of the drive
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The invention relates to a motor rotation speed control device, a motor and food processing equipment, wherein the motor rotation speed control device comprises: the rotating speed feedback circuit comprises a rotating speed sensing unit and an adjustable resistor, wherein the rotating speed sensing unit is used for adjusting the resistance value of the adjustable resistor according to the current rotating speed of the motor; the rotating speed control loop comprises a first capacitor, a bidirectional diode and a controllable switch tube, wherein the first capacitor is connected with an adjustable resistor in series and is provided with a first node, the first node is connected with one end of the bidirectional diode, the other end of the bidirectional diode is connected with the control end of the controllable switch tube, when the motor is electrified and works, a power supply charges the first capacitor through the motor and the adjustable resistor, and the bidirectional diode and the controllable switch tube are turned on or off under the charging voltage of the first capacitor so as to adjust the rotating speed of the motor. Therefore, the motor rotating speed can be accurately controlled, and the motor rotating speed control device is simple in structure, easy to assemble, low in cost, reliable in performance and free from manual correction.
Description
Technical Field
The invention relates to the technical field of motor control, in particular to a motor rotating speed control device, a motor and food processing equipment.
Background
In general, when the load difference of the motor is large, the rotation speed of the motor is affected, for example, when the motor is in idle load or in low load, the rotation speed of the motor needs to be reduced, and when the motor is in heavy load, the rotation speed of the motor needs to be increased so as to control the rotation speed of the motor within a reasonable range.
In the related art, the rotational speed control of the motor is achieved in two ways. The centrifugal force generated by the rotation of the motor is utilized to switch the switch through mechanical transmission to realize the rotation speed selection of the motor, but the mode has the problems of complex structure, more assembly parts, high material cost, low control precision and high labor cost caused by the need of correcting each motor during assembly; the other is to use a microprocessor to control the rotating speed of the motor, but the method also has the problem of high cost.
Therefore, the motor rotating speed control scheme which is simple to assemble, low in cost, reliable in performance and free of manual correction is a technical problem to be solved.
Disclosure of Invention
Based on the above, it is necessary to provide a motor rotation speed control device which is simple to assemble, low in cost, reliable in performance and free from manual correction.
A motor speed control device, said motor speed control device comprising:
the rotating speed feedback circuit comprises a rotating speed sensing unit and an adjustable resistor, wherein the rotating speed sensing unit is used for adjusting the resistance value of the adjustable resistor according to the current rotating speed of the motor;
the rotating speed control loop comprises a first capacitor, a bidirectional diode and a controllable switch tube, wherein the first capacitor is connected with the adjustable resistor in series and is provided with a first node, the first node is connected with one end of the bidirectional diode, the other end of the bidirectional diode is connected with the control end of the controllable switch tube, and when the motor is electrified and works, a power supply charges the first capacitor through the motor and the adjustable resistor, and the bidirectional diode and the controllable switch tube are conducted or cut off under the charging voltage of the first capacitor so as to regulate the rotating speed of the motor.
In one embodiment, the rotation speed sensing unit includes an inductance coil connected in parallel with the adjustable resistor, and the inductance coil is used for sensing the current rotation speed of the motor and outputting an induction current to the adjustable resistor.
In one embodiment, the rotation speed sensing unit includes a transformer connected in parallel with the adjustable resistor, and the transformer is configured to sense an operation current/operation voltage of the motor and output the sensed current/voltage to the adjustable resistor.
In one embodiment, the adjustable resistor is a positive temperature coefficient thermistor.
In one embodiment, the motor rotation speed control device further includes:
and the temperature compensation circuit is arranged corresponding to the positive temperature coefficient thermistor and used for carrying out environmental temperature compensation on the positive temperature coefficient thermistor.
In one embodiment, the temperature compensation circuit includes:
and the negative temperature coefficient thermistor is connected with the positive temperature coefficient thermistor in series.
In one embodiment, the motor rotation speed control device further includes:
the filter circuit is arranged between the first node and one end of the bidirectional diode and is used for carrying out filter processing on the charging voltage of the first capacitor.
In one embodiment, the filter circuit includes: a C filter circuit, an RC filter circuit, or an LC filter circuit.
An electric motor comprises the motor rotating speed control device.
A food processing apparatus comprising the motor described above.
Above-mentioned motor rotational speed controlling means, motor and food processing equipment, adjust adjustable resistance's resistance according to the current rotational speed of motor through the rotational speed induction unit, power supply charges for first electric capacity through motor and adjustable resistance, bidirectional diode and controllable switch tube switch on or turn off under the charging voltage of first electric capacity in order to adjust the rotational speed of motor, can realize the accurate control of motor rotational speed from this, and have simple structure, assembly is simple, with low costs, the dependable performance just need not the advantage of manual correction.
Drawings
Fig. 1 is a schematic diagram showing a structure of a motor rotation speed control device in a first embodiment;
FIG. 2 is a schematic diagram of the conduction angle of the power supply in each half cycle in one embodiment;
fig. 3a is a schematic structural diagram of a motor rotation speed control device in a second embodiment;
fig. 3b is a schematic structural diagram of a motor rotation speed control device in a third embodiment;
fig. 4 is a schematic structural view of a motor rotation speed control device in a fourth embodiment;
fig. 5 is a schematic structural view of a motor rotation speed control device in a fifth embodiment;
fig. 6 is a schematic structural view of a motor rotation speed control device in a sixth embodiment;
FIG. 7 is a block diagram of an electric machine in one embodiment; and
fig. 8 is a block diagram of a food processing device in one embodiment.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit or scope of the invention, which is therefore not limited to the specific embodiments disclosed below.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
Fig. 1 is a schematic structural diagram of a motor rotation speed control device according to an embodiment, and as shown in fig. 1, the motor rotation speed control device includes: a rotational speed feedback circuit 110 and a rotational speed control circuit 120.
The rotation speed feedback circuit 110 includes a rotation speed sensing unit 112 and an adjustable resistor RT1, wherein the rotation speed sensing unit 112 is configured to adjust a resistance value of the adjustable resistor RT1 according to a current rotation speed of the motor; the rotation speed control loop 120 includes a first capacitor C1, a bidirectional diode DZ and a controllable switching tube SC (e.g. a thyristor), where the first capacitor C1 is connected in series with the adjustable resistor RT1 and has a first node J1, the first node J1 is connected to one end of the bidirectional diode DZ, and the other end of the bidirectional diode DZ is connected to a control end of the controllable switching tube SC. When the motor M is electrified to work, the power supply AC charges the first capacitor C1 through the motor M and the adjustable resistor RT1, and the bidirectional diode DZ and the controllable switch tube SC are turned on or off under the charging voltage of the first capacitor C1 so as to regulate the rotating speed of the motor M.
Specifically, as shown in fig. 1, when the power supply AC is connected, a current charges the first capacitor C1 through the motor M and the adjustable resistor RT1. Assuming that the trigger voltage of the bidirectional diode DZ is Vt, and the on voltage of the controllable switch tube SC is Vf, when the voltage (i.e., the charging voltage) at two ends of the first capacitor C1 is smaller than the absolute value of vt+vf, the bidirectional diode DZ cannot be triggered to be turned on, i.e., the bidirectional diode DZ is in an off state, and the controllable switch tube SC is in an off state; when the voltage across the first capacitor C1 is greater than or equal to the absolute value of vt+vf, the bidirectional diode DZ is triggered to be turned on, i.e. the bidirectional diode DZ is in a conductive state, while the controllable switch tube SC is in a conductive state. Thereby, the conduction angle α of the power supply AC in each half cycle can be controlled, as shown in fig. 2 in particular.
The magnitude of the conduction angle α is related to when the voltage across the first capacitor C1 is charged to the trigger value vt+vf, for example, the shorter the voltage across the first capacitor C1 is charged to the trigger value vt+vf, i.e. the faster the voltage rising speed, the smaller the conduction angle α, and vice versa. When the capacitance of the first capacitor C1 is fixed, the voltage rising speed at two ends of the first capacitor C1 is related to the resistance of the adjustable resistor RT1, and the smaller the resistance is, the faster the voltage rising speed is, and vice versa. Therefore, the voltage rising speed at the two ends of the first capacitor C1 can be changed by changing the resistance value of the adjustable resistor RT1, so as to change the magnitude of the conduction angle α.
The resistance of the adjustable resistor RT1 can be adjusted in real time based on the current rotation speed of the motor M, for example, the voltage or the current corresponding to the current rotation speed of the induction motor M can be obtained, and the resistance of the adjustable resistor RT1 is adjusted according to the voltage or the current, so that the conduction angle α is adjusted. The magnitude of the conduction angle α determines the rotation speed of the motor M, for example, the larger the conduction angle α is, the less power is loaded on the motor M, so that the rotation speed of the motor M is reduced; the smaller the conduction angle alpha is, the more power is loaded on the motor M, so that the rotating speed of the motor M is improved. Therefore, the resistance value of the adjustable resistor RT1 is adjusted based on the current rotating speed of the motor M, so that the voltage rising speed at two ends of the first capacitor C1 can be adjusted, the conduction angle alpha can be adjusted, the rotating speed of the motor M can be adjusted, and the purpose of controlling the rotating speed of the motor M is achieved.
Specifically, when the motor M needs to be controlled to operate, the power supply AC is connected, and at this time, current charges the first capacitor C1 through the motor M and the adjustable resistor RT1, and when the voltage across the first capacitor C1 reaches the trigger value vt+vf, the bidirectional diode DZ and the controllable switching tube SC are turned on to control the motor M to operate. In the running process of the motor M, the rotation speed sensing unit 112 further adjusts the resistance value of the adjustable resistor RT1 according to the current rotation speed of the motor M, when the resistance value of the adjustable resistor RT1 changes, the time when the voltage at two ends of the first capacitor C1 reaches the trigger value vt+vf will change accordingly, so that the conduction time of the bidirectional diode DZ and the controllable switch tube SC changes, and further the conduction angle α of the power supply in each half period changes, and the motor M has different rotation speeds under different conduction angles α, thereby realizing effective control of the rotation speed of the motor M.
In the above embodiment, the resistance value of the adjustable resistor is adjusted according to the current rotation speed of the motor through the rotation speed sensing unit, the power supply charges the first capacitor through the motor and the adjustable resistor, and the bidirectional diode and the controllable switch tube are conducted or turned off under the charging voltage of the first capacitor so as to adjust the rotation speed of the motor, so that the accurate control of the rotation speed of the motor can be realized, and the motor has the advantages of simple structure, simplicity in assembly, low cost, reliable performance and no need of manual correction.
In one embodiment, as shown in fig. 3a, the rotation speed sensing unit 112 includes an inductance coil L, which is connected in parallel with the adjustable resistor RT1, and the inductance coil L is used to sense the current rotation speed of the motor and output the sensing current to the adjustable resistor RT1. The adjustable resistor RT1 may be a positive temperature coefficient thermistor.
Referring to fig. 3a, the rotational speed feedback circuit 110 may be composed of an inductance coil L and a positive temperature coefficient thermistor. In practical applications, the inductor L may be implanted into the motor M, so that when the motor M is powered on, the rotor of the motor M rotates, the magnet on the rotor cuts the inductor L, and an induced current is generated on the inductor L, and when the induced current is applied to the ptc thermistor, the greater the induced current, the higher the temperature of the ptc thermistor, and the greater the resistance thereof, and vice versa. Therefore, the resistance of the positive temperature coefficient thermistor can be adjusted according to the current rotating speed of the motor M through the inductance coil L, the voltage rising speed at two ends of the first capacitor C1 is adjusted, the rotating speed of the motor M is finally adjusted, the resistance of the positive temperature coefficient thermistor corresponds to the current rotating speed of the motor M one by one, the current rotating speed of the motor M can be truly reflected by the resistance, and therefore the rotating speed control accuracy of the motor M can be guaranteed.
In the above embodiment, the resistance of the adjustable resistor is changed by the rotation speed of the induction coil induction motor, so as to change the voltage rising speed at two ends of the first capacitor, and further change the conduction angle of the power supply in each half period, so as to realize the control of the rotation speed of the motor. The resistance of the adjustable resistor corresponds to the current rotating speed of the motor one by one, and the resistance can truly reflect the current rotating speed of the motor, so that the accuracy of rotating speed control can be ensured, and the whole device has the advantages of simple structure, simple assembly, easiness in realization, high reliability, low cost and no need of manual correction.
In one embodiment, as shown in fig. 3b, the rotation speed sensing unit 112 includes a transformer T, which is connected in parallel with the adjustable resistor RT1, for sensing an operation current/operation voltage of the motor M and outputting the sensed current/voltage to the adjustable resistor RT1.
Referring to fig. 3b, the rotational speed feedback circuit 110 may be composed of a transformer T and a positive temperature coefficient thermistor. In practical application, the transformer T may be a current transformer or a voltage transformer, and the working current or the working voltage of the motor M is induced by the primary side of the current transformer or the voltage transformer to indirectly induce the current rotation speed of the motor M (the current rotation speed of the motor M corresponds to the working current or the working voltage of the motor M), and an induced current or an induced voltage (also referred to as a secondary side current or a secondary side voltage) is generated on the secondary side of the current transformer or the voltage transformer, so as to adjust the resistance value of the ptc thermistor by the induced current or the induced voltage. For example, when an induced current or an induced voltage is applied to the ptc thermistor, the higher the induced current or the induced voltage, the higher the temperature of the ptc thermistor, the greater the resistance thereof, and vice versa. Therefore, the resistance of the positive temperature coefficient thermistor can be adjusted according to the current rotating speed of the motor M through the transformer T, the voltage rising speed at two ends of the first capacitor C1 is adjusted, the rotating speed of the motor M is finally adjusted, the resistance of the positive temperature coefficient thermistor corresponds to the current rotating speed of the motor M one by one, the current rotating speed of the motor M can be truly reflected by the resistance, and therefore the rotating speed control accuracy of the motor M can be guaranteed.
In the above embodiment, the resistance value of the adjustable resistor is changed by the transformer according to the rotation speed of the motor, so as to change the voltage rising speed of the two ends of the first capacitor, and further change the conduction angle of the power supply in each half period, so as to realize the control of the rotation speed of the motor. The resistance of the adjustable resistor corresponds to the current rotating speed of the motor one by one, and the resistance can truly reflect the current rotating speed of the motor, so that the accuracy of rotating speed control can be ensured, and the whole device has the advantages of simple structure, simplicity in assembly, high reliability, low cost and no need of manual correction.
In one embodiment, as shown in fig. 4, the rotation speed control circuit 120 further includes a first resistor R1, where the first resistor R1 is connected in series in the charging circuit of the first capacitor C1, for example, the first resistor R1 may be connected in series between the adjustable resistor RT1 and the motor M, or may be connected in series between the first node J1 and the adjustable resistor RT1. Through the reasonable design to first resistance R1, adjustable resistance RT1 and first electric capacity C1, can make the voltage rising speed at first electric capacity C1 both ends satisfy actual demand, and then make the conduction angle of power supply AC in every half cycle satisfy the demand to control motor M's rotational speed in reasonable scope.
In one embodiment, as shown in fig. 5, the motor rotation speed control device further includes: the temperature compensation circuit 130 is arranged corresponding to the positive temperature coefficient thermistor, and is used for performing ambient temperature compensation on the positive temperature coefficient thermistor.
Specifically, since the ptc thermistor itself is affected by the ambient temperature, which further affects the control of the rotational speed of the motor M, in order to effectively reduce or avoid such an effect, the temperature compensation circuit 130 may be added, and the ptc thermistor is subjected to ambient temperature compensation by the temperature compensation circuit 130. For example, when the resistance of the ptc thermistor increases or decreases with the ambient temperature, the temperature compensation circuit 130 may perform temperature compensation to offset the increase or decrease of the resistance of the ptc thermistor caused by the ambient temperature, so that the resistance of the ptc thermistor is more matched with the current rotation speed of the motor M, and the rotation speed control of the motor M is more accurate.
In one embodiment, the temperature compensation circuit 130 includes: the negative temperature coefficient thermistor RT2, the negative temperature coefficient thermistor RT2 is connected in series with the positive temperature coefficient thermistor, for example, the negative temperature coefficient thermistor RT2 may be connected in series between the first node J1 and the positive temperature coefficient thermistor, or may be connected in series between the positive temperature coefficient thermistor and the motor M. When the resistance of the positive temperature coefficient thermistor increases or decreases along with the increase or decrease of the ambient temperature, the resistance change of the negative temperature coefficient thermistor RT2 is opposite to the resistance change, so that the resistance change of the positive temperature coefficient thermistor can be counteracted by reasonably selecting the negative temperature coefficient thermistor RT2, the influence of the ambient temperature on the total resistance of the charging loop is effectively reduced or avoided, the rotating speed control of the motor M is more accurate, and the circuit structure is simple and reliable.
In one embodiment, as shown in fig. 6, the motor rotation speed control device further includes: the filter circuit 140, the filter circuit 140 is disposed between the first node J1 and one end of the bidirectional diode DZ, and is configured to perform a filtering process on the charging voltage of the first capacitor C1, so as to reduce the ripple voltage, so that the conduction angle is more stable.
Specifically, since the supply voltage of the power supply AC and the induction current or induction voltage of the inductance coil L or the transformer T are alternating, so that the voltage ripple on the first capacitor C1 is larger, and the ripple affects the magnitude of the conduction angle α, a filter circuit 140 is added between the first capacitor C1 and the bidirectional diode DZ, and the ripple is suppressed by the filter circuit 140, so that the conduction angle α is ensured to be in a stable state, and the stable control of the rotation speed of the motor M is ensured.
In one embodiment, the filter circuit 140 includes: a C filter circuit, an RC filter circuit or an LC filter circuit. As shown in fig. 6, when the filter circuit 140 includes an RC filter circuit, it may include a second resistor R2 and a second capacitor C2. It will be appreciated that in practical applications, the filter circuit 140 may be any other circuit, such as a C filter circuit, a pi RC filter circuit, or an LC filter circuit, which is not limited in particular.
It should be noted that, in the above embodiments, the power supply AC is taken as an example of an AC power supply, and in practical application, the power supply AC may be replaced by a dc power supply to control the dc motor.
In one embodiment, as shown in fig. 7, there is also provided a motor 1000 including the motor rotation speed control device 100 described above. The motor 1000 may be a dc motor or an ac motor.
In this embodiment, the resistance value of the adjustable resistor is adjusted according to the current rotation speed of the motor through the rotation speed sensing unit, the power supply charges the first capacitor through the motor and the adjustable resistor, and the bidirectional diode and the controllable switch tube are turned on or off under the charging voltage of the first capacitor so as to adjust the rotation speed of the motor, so that the automatic and accurate control of the rotation speed of the motor can be realized, the rotation speed of the motor can be automatically adjusted along with the change of the load, and the motor is simple in structure, simple in assembly, low in cost, reliable in performance and free from manual correction.
In one embodiment, as shown in fig. 8, there is also provided a food processing apparatus 10000 comprising the motor 1000 described above. Wherein the food processing apparatus 10000 may be a blender, a crusher, etc.
In this embodiment, adjust the resistance of adjustable resistance according to the current rotational speed of motor through rotational speed induction element, power supply charges for first electric capacity through motor and adjustable resistance, two-way diode and controllable switch tube switch on or turn off under the charging voltage of first electric capacity in order to adjust the rotational speed of motor, can realize the accurate control of motor rotational speed from this, and then make the rotational speed of motor in the food processing equipment can follow the change automatically regulated of load, and simple structure, the assembly is simple, with low costs, dependable performance just need not artifical correction.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. A motor speed control device, characterized in that the motor speed control device comprises:
the rotating speed feedback circuit comprises a rotating speed sensing unit and an adjustable resistor, wherein the rotating speed sensing unit is used for adjusting the resistance value of the adjustable resistor according to the current rotating speed of the motor;
the rotating speed control loop comprises a first capacitor, a bidirectional diode and a controllable switch tube, wherein the first capacitor is connected with the adjustable resistor in series and is provided with a first node, the first node is connected with one end of the bidirectional diode, the other end of the bidirectional diode is connected with the control end of the controllable switch tube, and when the motor is electrified and works, a power supply charges the first capacitor through the motor and the adjustable resistor, and the bidirectional diode and the controllable switch tube are conducted or cut off under the charging voltage of the first capacitor so as to regulate the rotating speed of the motor.
2. The motor rotation speed control device according to claim 1, wherein the rotation speed sensing unit includes an inductance coil connected in parallel with the adjustable resistor, the inductance coil being configured to sense a current rotation speed of the motor and output an induced current to the adjustable resistor.
3. The motor rotation speed control device according to claim 1, wherein the rotation speed sensing unit includes a transformer connected in parallel with the adjustable resistor, the transformer being configured to sense an operation current/operation voltage of the motor and output the sensed current/voltage to the adjustable resistor.
4. A motor speed control device according to claim 2 or 3, wherein the adjustable resistor is a positive temperature coefficient thermistor.
5. The motor speed control device according to claim 4, characterized in that the motor speed control device further comprises:
and the temperature compensation circuit is arranged corresponding to the positive temperature coefficient thermistor and used for carrying out environmental temperature compensation on the positive temperature coefficient thermistor.
6. The motor speed control device according to claim 5, wherein the temperature compensation circuit includes:
and the negative temperature coefficient thermistor is connected with the positive temperature coefficient thermistor in series.
7. The motor speed control device according to claim 1, characterized in that the motor speed control device further comprises:
the filter circuit is arranged between the first node and one end of the bidirectional diode and is used for carrying out filter processing on the charging voltage of the first capacitor.
8. The motor speed control device according to claim 7, wherein the filter circuit includes: a C filter circuit, an RC filter circuit, or an LC filter circuit.
9. An electric motor comprising the motor rotation speed control device according to any one of claims 1 to 8.
10. A food processing apparatus comprising a motor according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811326753.6A CN109347401B (en) | 2018-11-08 | 2018-11-08 | Motor rotation speed control device, motor and food processing equipment |
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| CN201811326753.6A CN109347401B (en) | 2018-11-08 | 2018-11-08 | Motor rotation speed control device, motor and food processing equipment |
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| CN109347401A CN109347401A (en) | 2019-02-15 |
| CN109347401B true CN109347401B (en) | 2023-11-28 |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3423666A (en) * | 1965-02-19 | 1969-01-21 | Walter J Brown | Electrical control systems |
| GB9105704D0 (en) * | 1990-11-15 | 1991-05-01 | Sunbeam Corp | Full-wave feedback speed control for hand mixer |
| CN2181131Y (en) * | 1994-02-05 | 1994-10-26 | 于如涛 | AC motor speed-regulator |
| CN203151419U (en) * | 2013-03-21 | 2013-08-21 | 浙江湖州新京昌电子有限公司 | Rotating speed controller for gun drill |
| CN205689473U (en) * | 2016-06-12 | 2016-11-16 | 广东金莱特电器股份有限公司 | AC fan Novel electrodeless alignment circuit |
| CN106685282A (en) * | 2015-11-05 | 2017-05-17 | 广东美的生活电器制造有限公司 | Electric appliance and motor speed regulating device thereof |
| CN206533311U (en) * | 2016-12-23 | 2017-09-29 | 安庆明基服饰有限责任公司 | A kind of micro machine pedal speed-adjusting device |
| CN108497952A (en) * | 2017-02-23 | 2018-09-07 | 广东美的生活电器制造有限公司 | Food cooking machine and its anti-blocking rotary device, method |
| CN209200966U (en) * | 2018-11-08 | 2019-08-02 | 深圳和而泰智能控制股份有限公司 | Motor speed control device, motor and food processing equipment |
-
2018
- 2018-11-08 CN CN201811326753.6A patent/CN109347401B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3423666A (en) * | 1965-02-19 | 1969-01-21 | Walter J Brown | Electrical control systems |
| GB9105704D0 (en) * | 1990-11-15 | 1991-05-01 | Sunbeam Corp | Full-wave feedback speed control for hand mixer |
| CN2181131Y (en) * | 1994-02-05 | 1994-10-26 | 于如涛 | AC motor speed-regulator |
| CN203151419U (en) * | 2013-03-21 | 2013-08-21 | 浙江湖州新京昌电子有限公司 | Rotating speed controller for gun drill |
| CN106685282A (en) * | 2015-11-05 | 2017-05-17 | 广东美的生活电器制造有限公司 | Electric appliance and motor speed regulating device thereof |
| CN205689473U (en) * | 2016-06-12 | 2016-11-16 | 广东金莱特电器股份有限公司 | AC fan Novel electrodeless alignment circuit |
| CN206533311U (en) * | 2016-12-23 | 2017-09-29 | 安庆明基服饰有限责任公司 | A kind of micro machine pedal speed-adjusting device |
| CN108497952A (en) * | 2017-02-23 | 2018-09-07 | 广东美的生活电器制造有限公司 | Food cooking machine and its anti-blocking rotary device, method |
| CN209200966U (en) * | 2018-11-08 | 2019-08-02 | 深圳和而泰智能控制股份有限公司 | Motor speed control device, motor and food processing equipment |
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