CN213484776U - Three keep off adjustable brushless motor of constant speed - Google Patents
Three keep off adjustable brushless motor of constant speed Download PDFInfo
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- CN213484776U CN213484776U CN202022876044.4U CN202022876044U CN213484776U CN 213484776 U CN213484776 U CN 213484776U CN 202022876044 U CN202022876044 U CN 202022876044U CN 213484776 U CN213484776 U CN 213484776U
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- brushless motor
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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
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/08—Arrangements for controlling the speed or torque of a single motor
Abstract
The utility model particularly relates to a three keep off adjustable brushless motor of constant speed, the control circuit of this motor includes: the frequency conversion device comprises a control unit, a frequency conversion unit and a driving unit, wherein the frequency conversion unit and the driving unit are electrically connected with the control unit; the frequency conversion unit is electrically connected with the driving unit; the control unit is suitable for controlling the frequency conversion unit to transmit input voltage of a corresponding voltage grade to the driving unit and controlling the driving unit to drive the brushless motor to rotate at a corresponding rotating speed under the voltage grade, namely the brushless motor is enabled to output the corresponding rotating speed under the condition that the input voltage of a corresponding gear is selected; the utility model discloses a frequency conversion unit provides many gears input voltage to reliably work under corresponding fender position input voltage through drive unit drive brushless motor, and can realize adjusting brushless motor and keep off position input voltage rotational speed down corresponding through the control unit, satisfy brushless motor low-power consumption, safety, demand that life is high, improved production efficiency and practiced thrift the cost.
Description
Technical Field
The utility model belongs to the technical field of control circuit, concretely relates to three keep off adjustable brushless motor of constant speed.
Background
The existing brushless motor inputs fixed direct-current voltage, so that heating and service life attenuation are easily caused, and high input voltage is not needed for low rotating speed, so that the electric energy consumption is too high, and the production cost is improved.
Therefore, it is desirable to develop a new control circuit and operating method for a three-speed constant-speed brushless motor to solve the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a three keep off adjustable brushless motor of constant speed.
In order to solve the technical problem, the utility model provides a three keep off adjustable brushless motor of constant speed, a serial communication port, include: a three-gear constant-speed adjustable brushless motor control circuit; the three-gear constant-speed adjustable brushless motor control circuit is suitable for controlling the brushless motor to select different gear input voltages and output corresponding rotating speeds; three keep off adjustable brushless motor control circuit of constant speed, it includes: the frequency conversion device comprises a control unit, a frequency conversion unit and a driving unit, wherein the frequency conversion unit and the driving unit are electrically connected with the control unit; the frequency conversion unit is electrically connected with the driving unit; the control unit is suitable for controlling the frequency conversion unit to transmit input voltage of a corresponding voltage grade to the driving unit and controlling the driving unit to drive the brushless motor to rotate at a corresponding rotating speed under the voltage grade, and therefore the brushless motor can output the corresponding rotating speed under the condition that the input voltage of a corresponding gear is selected. The three-gear constant-speed adjustable brushless motor control circuit further comprises: and the wireless module is electrically connected with the control unit.
Further, the frequency conversion unit includes: a variable frequency inverter circuit; the input end of the frequency conversion inverter circuit is provided with three input pins, namely the three input pins are a live wire low gear input pin, a live wire middle gear input pin and a live wire high gear input pin respectively; the control unit is suitable for selecting one of the live wire low-gear input pin, the live wire middle-gear input pin and the live wire high-gear input pin to be connected with the live wire, so that the output end of the variable-frequency inverter circuit transmits input voltage of corresponding voltage grade to the driving unit.
Furthermore, the control unit is connected with the live wire low-gear input pin, the live wire middle-gear input pin and the live wire high-gear input pin through corresponding schottky diodes respectively, namely the control unit controls the state of the corresponding schottky diodes through outputting corresponding level signals to select one path of input pins to be connected with the live wire.
Further, the frequency conversion inverter circuit includes: a first rectifier bridge and a second rectifier bridge; and one input pin connected to the live wire outputs direct current input voltage of corresponding voltage grade to the driving unit through the first rectifier bridge and the second rectifier bridge.
Further, the driving unit includes: the half-bridge grid driver is electrically connected with the control unit; the half-bridge grid driver is provided with a U-phase port, a V-phase port and a W-phase port which are respectively connected with corresponding three-phase ports of the brushless motor, namely, the control unit is suitable for controlling the corresponding phase ports of the half-bridge grid driver to output current so as to adjust the rotating speed of the brushless motor.
Further, the three-gear constant-speed adjustable brushless motor control circuit further comprises: the wireless module is electrically connected with the control unit; the wireless module is suitable for receiving corresponding control signals, namely the control unit is suitable for controlling the frequency conversion unit to transmit input voltage with corresponding voltage grade to the driving unit according to the control signals and controlling the driving unit to drive the brushless motor to rotate at corresponding rotating speed under the voltage grade.
On the other hand, the utility model provides a three keep off adjustable brushless motor of constant speed, it includes: the three-gear constant-speed adjustable brushless motor control circuit is described above; the three-gear constant-speed adjustable brushless motor control circuit is suitable for controlling the brushless motor to select different gear input voltages and output corresponding rotating speeds.
Further, the different gear input voltages are divided into a low gear input voltage, a middle gear input voltage and a high gear input voltage, and the set rotating speed of the brushless motor under the corresponding gear is adjustable.
The third aspect, the utility model provides a three keep off adjustable brushless motor working method of constant speed, it includes: setting the rotating speed of the brushless motor under different gear input voltages; selecting input voltage of a corresponding gear of the brushless motor; and driving the brushless motor to operate at a set rotating speed under the gear input voltage.
Further, the motor is suitable for driving the three-gear constant-speed adjustable brushless motor to work.
The beneficial effects of the utility model are that, the utility model discloses a frequency conversion unit provides many gears input voltage to through drive unit drive brushless motor reliable work under corresponding fender position input voltage, and can realize adjusting brushless motor and corresponding fender position input voltage lower rotational speed through the control unit, satisfy brushless motor low-power consumption, safety, demand that life is high, improved production efficiency and practiced thrift the cost.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic block diagram of a three-gear constant-speed adjustable brushless motor control circuit according to the present invention;
fig. 2 is a circuit diagram of a control unit of the present invention;
fig. 3 is a first part of a circuit diagram of the variable frequency inverter circuit of the present invention;
fig. 4 is a second part of the circuit diagram of the variable frequency inverter circuit of the present invention;
fig. 5 is a third part of the circuit diagram of the variable frequency inverter circuit of the present invention;
fig. 6 is a first part of a circuit diagram of a drive unit of the invention;
fig. 7 is a second part of the circuit diagram of the drive unit of the invention;
fig. 8 is a third part of the circuit diagram of the drive unit of the present invention;
fig. 9 is a fourth part of the circuit diagram of the driving unit of the present invention;
fig. 10 is a fifth part of the circuit diagram of the drive unit of the present invention;
fig. 11 is a circuit diagram of the wireless module of the present invention;
fig. 12 is a circuit diagram of the temperature protection circuit of the present invention;
fig. 13 is a circuit diagram of the voltage dividing circuit of the present invention;
fig. 14 is a schematic block diagram of a three-gear constant-speed adjustable brushless motor according to the present invention;
fig. 15 is a flowchart of the operating method of the three-gear constant-speed adjustable brushless motor according to the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1
Fig. 1 is a schematic block diagram of a three-gear constant-speed adjustable brushless motor control circuit according to the present invention.
In this embodiment, as shown in fig. 1, the present embodiment provides a three-gear constant-speed adjustable brushless motor control circuit, which includes: the frequency conversion device comprises a control unit, a frequency conversion unit and a driving unit, wherein the frequency conversion unit and the driving unit are electrically connected with the control unit; the frequency conversion unit is electrically connected with the driving unit; the control unit is suitable for controlling the frequency conversion unit to transmit input voltage of a corresponding voltage grade to the driving unit and controlling the driving unit to drive the brushless motor to rotate at a corresponding rotating speed under the voltage grade, and therefore the brushless motor can output the corresponding rotating speed under the condition that the input voltage of a corresponding gear is selected.
In this embodiment, the control unit may receive a control instruction from a user, that is, adjust the corresponding gear input voltage of the brushless motor according to the corresponding control instruction to output the corresponding rotation speed.
Fig. 2 is a circuit diagram of the control unit of the present invention.
In this embodiment, referring to fig. 2, the control unit U5 can be but is not limited to FU6812L microprocessor.
In this embodiment, this embodiment provides many grades of input voltage through the frequency conversion unit to reliably work under corresponding fender position input voltage through drive unit drive brushless motor, and can realize adjusting brushless motor and correspond fender position input voltage lower speed through the control unit, satisfy brushless motor low-power consumption, safety, demand that life is high, improved production efficiency and practiced thrift the cost.
Fig. 3 is a first part of a circuit diagram of the variable frequency inverter circuit of the present invention;
fig. 4 is a second part of the circuit diagram of the variable frequency inverter circuit of the present invention;
fig. 5 is a third part of the circuit diagram of the variable frequency inverter circuit of the present invention.
In this embodiment, as shown in fig. 3, 4 and 5, the frequency conversion unit includes: a variable frequency inverter circuit; the input end of the frequency conversion inverter circuit is provided with three input pins, namely the three input pins are a live wire low gear input pin, a live wire middle gear input pin and a live wire high gear input pin respectively; the control unit is suitable for selecting one of the live wire low-gear input pin, the live wire middle-gear input pin and the live wire high-gear input pin to be connected with the live wire, so that the output end of the variable-frequency inverter circuit transmits input voltage of corresponding voltage grade to the driving unit.
In this embodiment, referring to fig. 3, the end L of the live wire low-gear input pin, the end M of the live wire middle-gear input pin, and the end H of the live wire high-gear input pin are connected to the live wire and the zero wire through a socket CN4, the AC _ N end of the frequency conversion inverter circuit is connected to the zero wire, and the PE pin in the socket CN4 is grounded.
In this embodiment, please refer to fig. 3, a safety capacitor CX1 is disposed at an output end of the frequency conversion inverter circuit for filtering for anti-interference.
In this embodiment, the control unit connects live wire low gear input foot, live wire middle gear input foot and live wire high gear input foot through corresponding schottky diode respectively, promptly the control unit controls corresponding schottky diode state through exporting corresponding level signal to select the input foot of a way to insert the live wire.
In the embodiment, referring to fig. 4, the control unit U5 controls the schottky diode D1, the schottky diode D3 and the schottky diode D4 through the HF terminal, the MF terminal and the LF terminal respectively to control whether the terminal H of the live wire high-gear input pin, the terminal M of the live wire middle-gear input pin and the terminal L of the live wire low-gear input pin are connected to the live wire.
In this embodiment, the inverter circuit includes: a first rectifier bridge BG1 and a second rectifier bridge BG 2; one input pin connected to the live wire outputs direct-current input voltage of corresponding voltage level to the driving unit through the first rectifier bridge BG1 and the second rectifier bridge BG 2.
In the present embodiment, the first rectifier bridge BG1 and the second rectifier bridge BG2 may adopt, but are not limited to, DB207S rectifier bridges.
In the present embodiment, referring to fig. 3, a thermistor TH1 is disposed at a connection between the three input pins and the first and second rectifier bridges BG1 and BG2, for limiting current and preventing temperature from increasing.
In this embodiment, referring to fig. 5, the frequency conversion inverter circuit can step down and output a 15V dc power supply for use by a step-down chip U3 (in this embodiment, a SY50582 chip may be used), and further output a 5V dc power supply by a voltage regulation chip U7 (in this embodiment, a 78M05 chip may be used).
In the embodiment, the variable-frequency inverter circuit can reliably provide power supply for the direct-current variable-frequency brushless motor.
Fig. 6 is a first part of a circuit diagram of a drive unit of the invention;
fig. 7 is a second part of the circuit diagram of the drive unit of the invention;
fig. 8 is a third part of the circuit diagram of the drive unit of the present invention;
fig. 9 is a fourth part of the circuit diagram of the driving unit of the present invention;
fig. 10 is a fifth part of the circuit diagram of the driving unit of the present invention.
In the present embodiment, as shown in fig. 6, 7, 8, 9, and 10, the driving unit includes: a half-bridge gate driver (FD 2606S half-bridge gate driver may be used in this embodiment) electrically connected to the control unit; the half-bridge grid driver is provided with a U-phase port, a V-phase port and a W-phase port which are respectively connected with corresponding three-phase ports of the brushless motor, namely, the control unit is suitable for controlling the corresponding phase ports of the half-bridge grid driver to output current so as to adjust the rotating speed of the brushless motor.
In this embodiment, referring to fig. 6, the half-bridge gate driver is an integrated chip, and is divided into a chip U2, a chip U4, and a chip U1, i.e., a U-phase port, a V-phase port, and a W-phase port, which are respectively connected to a U-phase, a V-phase, and a W-phase of the brushless motor.
In this embodiment, referring to fig. 7, the chip U2 controls the current of the U-phase port of the brushless motor through the driving tube Q5 and the driving tube Q6, the chip U4 controls the current of the V-phase port of the brushless motor through the driving tube Q3 and the driving tube Q4, and the chip U1 controls the current of the W-phase port of the brushless motor through the driving tube Q1 and the driving tube Q2.
In this embodiment, referring to fig. 8, 9, and 10, the control unit U5 collects the operating current of the brushless motor through the I _ shunt end, and adjusts the operating current of the V-phase and the U-phase of the brushless motor through the Iv + end and the Iu + end to adjust the rotation speed of the brushless motor.
In the embodiment, the control unit U5 automatically controls the three-phase current of the brushless motor, when the phase current approaches or exceeds the limit value Isref, the phase current of the brushless motor is operated below the limit value Isref by reducing the rotation speed or torque; when the three-phase current of the brushless motor exceeds a protection value FLT _ OC, the control unit U5 automatically stops the motor from running and automatically restarts after the restart interval time; when the phase current exceeds the Short-circuit current protection value I _ Short, the Short-circuit current protection circuit of the hardware can automatically stop the motor from running. Automatically restarting after the restart interval time; when the temperature of the NTC1 temperature resistor near the IPM reaches a temperature protection value Tover, stopping the motor from running; when the temperature of the NTC1 temperature resistor is lower than the temperature protection recovery value Tov _ r, the motor operation is recovered; when the control power supply Vcc is lower than the control low voltage detection set value Vccuv, the half-bridge grid driver stops the operation of the brushless motor, and when the control voltage is higher than the control low voltage recovery set value Vccuv _ r, the operation of the brushless motor is recovered; when the driving power supply Vdc exceeds a set range, the brushless motor stops running; when the brushless motor is stopped due to failure or protection action, the brushless motor can be started again only after the failure interval time T _ Restart.
In the embodiment, the half-bridge gate driver can detect the failure of calculating the position of the rotor so as to judge that the brushless motor is out of step; the phase loss is judged by detecting the three-phase output unbalance of the half-bridge grid driver.
Fig. 11 is a circuit diagram of the wireless module of the present invention.
In this embodiment, as shown in fig. 11, the three-gear constant-speed adjustable brushless motor control circuit further includes: a wireless module (in this embodiment, a BQ31081 wireless receiver may be used) electrically connected to the control unit; the wireless module is suitable for receiving corresponding control signals, namely the control unit is suitable for controlling the frequency conversion unit to transmit input voltage with corresponding voltage grade to the driving unit according to the control signals and controlling the driving unit to drive the brushless motor to rotate at corresponding rotating speed under the voltage grade.
In the embodiment, the external device is wirelessly connected with the control unit through the wireless module, namely, code matching with the control unit is realized, so that the rotating speed of each gear of the brushless motor is set and stored; the external equipment sends a code matching instruction to the control unit, and the control unit stops the operation of the brushless motor and stores the ID code after receiving the code matching instruction; when the control unit quits code checking, the control unit continues to operate according to the original gear and the original rotating speed, and the code checking is effective within 30 seconds after the control unit is electrified.
In the embodiment, the external device sends a setting control instruction to the control unit, and the control unit stops the operation of the brushless motor and enters the rotation speed setting; the control unit selects a gear needing to set the rotating speed under the corresponding gear through different keys; the control unit quits the rotating speed setting after the rotating speed is set, and controls the brushless motor to operate according to the set rotating speed; the rotating speed set by the control unit has a power failure memory function.
Fig. 12 is a circuit diagram of the temperature protection circuit of the present invention.
In this embodiment, referring to fig. 12, the three-gear constant-speed adjustable brushless motor control circuit further includes: the temperature protection circuit arranged in the circuit, namely an NTC1 temperature resistor is arranged to acquire the circuit temperature, and when the circuit temperature exceeds a preset value, the control unit cuts off the power supply end.
Fig. 13 is a circuit diagram of the voltage divider circuit of the present invention.
In this embodiment, referring to fig. 13, the three-gear constant-speed adjustable brushless motor control circuit further includes: and the voltage division circuit is connected with the output end of the variable frequency inverter circuit to divide voltage.
In this embodiment, the control unit is adapted to detect whether the brushless motor is faulty or not, and display the fault through the display module.
Example 2
Fig. 14 is a schematic block diagram of a three-gear constant-speed adjustable brushless motor according to the present invention;
on the basis of embodiment 1, as shown in fig. 14, this embodiment provides a three-gear constant-speed adjustable brushless motor, which includes: the three-gear constant-speed adjustable brushless motor control circuit provided by the embodiment 1; the three-gear constant-speed adjustable brushless motor control circuit is suitable for controlling the brushless motor to select different gear input voltages and output corresponding rotating speeds.
In the present embodiment, the three-gear constant speed adjustable brushless motor control circuit has been described in the above embodiments.
In this embodiment, the different gear input voltages are divided into a low gear input voltage, a middle gear input voltage and a high gear input voltage, and the set rotation speed of the brushless motor under the corresponding gear is adjustable.
Example 3
Fig. 15 is a flowchart of the operating method of the three-gear constant-speed adjustable brushless motor according to the present invention.
On the basis of the foregoing embodiments, as shown in fig. 15, the present embodiment provides a method for operating a three-gear constant-speed adjustable brushless motor, including: setting the rotating speed of the brushless motor under different gear input voltages; selecting input voltage of a corresponding gear of the brushless motor; and driving the brushless motor to operate at a set rotating speed under the gear input voltage.
In the present embodiment, the three-gear constant-speed adjustable brushless motor provided in embodiment 2 is suitable for driving to work.
In the present embodiment, the three-gear constant speed adjustable brushless motor has been described in the above embodiments.
To sum up, the utility model discloses a frequency conversion unit provides many gears input voltage to reliably work under corresponding fender position input voltage through drive unit drive brushless motor, and can realize adjusting brushless motor and keep off a position the rotational speed under the input voltage through the control unit, satisfy brushless motor low-power consumption, safety, demand that life is high, improved production efficiency and practiced thrift the cost.
In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (5)
1. The utility model provides a three keep off adjustable brushless motor of constant speed which characterized in that includes: a three-gear constant-speed adjustable brushless motor control circuit;
the three-gear constant-speed adjustable brushless motor control circuit is suitable for controlling the brushless motor to select different gear input voltages and output corresponding rotating speeds;
the adjustable brushless motor control circuit of three fender constant speed, include:
the frequency conversion device comprises a control unit, a frequency conversion unit and a driving unit, wherein the frequency conversion unit and the driving unit are electrically connected with the control unit; wherein
The frequency conversion unit is electrically connected with the driving unit;
the control unit is suitable for controlling the frequency conversion unit to transmit the input voltage of the corresponding voltage grade to the drive unit and controlling the drive unit to drive the brushless motor to rotate at the corresponding rotating speed under the voltage grade, namely
The brushless motor can output corresponding rotating speed under the condition of selecting corresponding gear input voltage.
2. The electrical machine of claim 1,
the frequency conversion unit includes: a variable frequency inverter circuit;
the input end of the frequency conversion inverter circuit is provided with three input pins, namely
The three input pins are respectively a live wire low gear input pin, a live wire middle gear input pin and a live wire high gear input pin;
the control unit is suitable for selecting one of the live wire low-gear input pin, the live wire middle-gear input pin and the live wire high-gear input pin to be connected with the live wire, so that the output end of the variable-frequency inverter circuit transmits input voltage of corresponding voltage grade to the driving unit.
3. The electrical machine of claim 2,
the control unit is respectively connected with the low-gear input pin of the live wire, the middle-gear input pin of the live wire and the high-gear input pin of the live wire through corresponding Schottky diodes, namely
The control unit controls the state of the corresponding Schottky diode by outputting the corresponding level signal so as to select one input pin to be connected with a live wire.
4. The electrical machine of claim 2,
the frequency conversion inverter circuit includes: a first rectifier bridge and a second rectifier bridge;
and one input pin connected to the live wire outputs direct current input voltage of corresponding voltage grade to the driving unit through the first rectifier bridge and the second rectifier bridge.
5. The electrical machine of claim 2,
the driving unit includes: the half-bridge grid driver is electrically connected with the control unit;
the half-bridge grid driver is provided with a U-phase port, a V-phase port and a W-phase port which are respectively connected with corresponding three-phase ports of the brushless motor, namely
The control unit is suitable for controlling the output current of the corresponding phase port of the half-bridge grid driver so as to adjust the rotating speed of the brushless motor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2020226329533 | 2020-11-16 | ||
| CN202022632953 | 2020-11-16 |
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| CN213484776U true CN213484776U (en) | 2021-06-18 |
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| CN202022876044.4U Active CN213484776U (en) | 2020-11-16 | 2020-12-04 | Three keep off adjustable brushless motor of constant speed |
| CN202011397693.4A Pending CN112468026A (en) | 2020-11-16 | 2020-12-04 | Three-gear constant-speed adjustable brushless motor and working method thereof |
| CN202022876042.5U Active CN213461580U (en) | 2020-11-16 | 2020-12-04 | Three keep off adjustable brushless motor control circuit of constant speed |
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| CN202011397693.4A Pending CN112468026A (en) | 2020-11-16 | 2020-12-04 | Three-gear constant-speed adjustable brushless motor and working method thereof |
| CN202022876042.5U Active CN213461580U (en) | 2020-11-16 | 2020-12-04 | Three keep off adjustable brushless motor control circuit of constant speed |
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| CN113162511B (en) * | 2021-04-20 | 2022-08-30 | 江西省万佳通照明科技有限公司 | Broken wall machine integrated circuit |
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| CN103825504B (en) * | 2012-11-16 | 2018-02-06 | 中山大洋电机股份有限公司 | A kind of blower motor |
| CN106160590A (en) * | 2016-07-23 | 2016-11-23 | 上海本家空调系统有限公司 | A kind of direct current brushless motor coil pipe |
| CN111416538A (en) * | 2020-05-14 | 2020-07-14 | 中山大洋电机股份有限公司 | Power supply circuit with voltage-multiplying output function, motor controller and motor control method |
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- 2020-12-04 CN CN202022876044.4U patent/CN213484776U/en active Active
- 2020-12-04 CN CN202011397693.4A patent/CN112468026A/en active Pending
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| CN112468026A (en) | 2021-03-09 |
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