CN210240080U

CN210240080U - High-voltage ceiling fan controller

Info

Publication number: CN210240080U
Application number: CN201921179793.2U
Authority: CN
Inventors: Zhaofeng Ye; 叶昭锋; Linglin Li; 李凌林
Original assignee: Shenzhen Weizhi Intelligent Technology Co ltd
Current assignee: Shenzhen Weizhi Intelligent Technology Co ltd
Priority date: 2019-07-25
Filing date: 2019-07-25
Publication date: 2020-04-03
Anticipated expiration: 2029-07-25

Abstract

The utility model discloses a high-voltage ceiling fan controller, which comprises an MCU main control module, a buzzer, an RF wireless receiving module, a current detection module, a voltage detection module, a half-bridge driving module, a protection module and a DC brushless motor, the MCU main control module is respectively connected with the buzzer, the RF wireless receiving module, the current detection module, the voltage detection module, the half-bridge driving module and the protection module, the half-bridge driving module is also connected with the DC brushless motor through an NMOS pipe, the motor driving board of the utility model is provided with a protection circuit, overcurrent protection, overvoltage and undervoltage protection, open-phase protection and locked rotor protection are realized through the protection circuit, once overcurrent, overvoltage, undervoltage, open-phase and locked rotor of the brushless DC motor occur, the protection circuit detects the threshold signal and returns the threshold signal to the control unit to turn off the control signal, so that the motor driving board and the brushless direct current motor are protected from being damaged.

Description

High-voltage ceiling fan controller

Technical Field

The utility model relates to a life electrical apparatus technical field specifically is a high-pressure ceiling fan controller.

Background

In the field of motors, brushless dc motors are rapidly developed and widely used, and are widely used in devices and instruments for daily life, automobile industry, aviation, consumer electronics, medical electronics, industrial automation, and the like. Brushless dc motors do not use mechanical commutator, and have many advantages in use compared to brushed motors, such as better torque and speed characteristics, dynamic response, high efficiency, long life, small size, and high speed. In addition, the better torque and external dimension ratio of the brushless direct current motor makes the brushless direct current motor more suitable for being used in occasions sensitive to the weight and the size of the motor. Therefore, a complete set of brushless dc motor driving control system is necessary for safe operation of the motor. Although motor drive systems have long existed, there are many safety concerns. For example: the circuit protection function is not perfect enough, once overcurrent, overvoltage, undervoltage, phase failure and locked rotor occur, the brushless direct current motor cannot work normally, and once the brushless direct current motor fails in operation, the motor driving plate is easy to damage. Because the circuit driving board is usually placed in a closed space and the motor control mode is to realize driving by a high-frequency switch, the heating value is also larger, and the damage of the motor driving board is easily caused by damaging components and parts due to over-temperature.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a high pressure ceiling fan controller to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a high-pressure ceiling fan controller, includes MCU host system, bee calling organ, RF wireless receiving module, detection current module, detection voltage module, half-bridge drive module, protection module and DC brushless motor, MCU host system connects bee calling organ, RF wireless receiving module, detection current module, detection voltage module, half-bridge drive module and protection module respectively, and half-bridge drive module still connects DC brushless motor through the NMOS pipe, still is connected with double resistance current sampling module and protection module on the DC brushless motor, and MCU host system is still connected to double resistance current sampling module.

As a further technical solution of the present invention: the MCU master control module is also connected with an interface module, and the interface module comprises a program burning interface and an SPI communication interface.

As a further technical solution of the present invention: the protection module comprises hardware overcurrent protection, software overcurrent protection, overvoltage protection, undervoltage protection, locked rotor protection and open-phase protection.

As a further technical solution of the present invention: the brushless DC motor is powered by 314V direct current.

As a further technical solution of the present invention: the MCU main control module and the half-bridge driving module are powered by 12V direct current.

As a further technical solution of the present invention: the NMOS tube module adopts 6 high-voltage N-MOSFET to form three half-bridge drives

As a further technical solution of the present invention: the half-bridge driving module adopts an ID5S609 half-bridge driving chip to drive an NMOS.

As a further technical solution of the present invention: the RF wireless remote control transceiver module is an RXB35 module.

As a further technical solution of the present invention: the MCU main control module is a FU6811L high-voltage direct-current brushless motor driving chip and comprises a crystal oscillator, a reset circuit, a burning program interface and an SPI communication interface.

Compared with the prior art, the beneficial effects of the utility model are that: 1. the utility model discloses a be provided with protection circuit on the motor drive board, realize overcurrent protection, excessive pressure undervoltage protection, open-phase protection and locked rotor protection through protection circuit, in case brushless DC motor overflows, excessive pressure, under-voltage, open-phase, locked rotor appear, return for the control unit turn-off control signal through protection circuit detection threshold value signal to motor drive board and brushless DC motor have been protected not damaged. 2. The utility model discloses a control unit's output signal is 6 way PWM sine wave signals, adopts sine wave control, has solved brushless DC motor start-up, noise problem when moving. 3. The novel shell assembly heat dissipation design effectively reduces the heat productivity of the main power device, improves the efficiency of the controller and prolongs the service life of the product.

Drawings

Fig. 1 is a schematic structural diagram of a brushless dc motor driving control system according to an embodiment of the present invention.

Fig. 2 is a main power circuit diagram of a brushless dc motor driving control system according to an embodiment of the present invention.

Fig. 3 is a circuit diagram of an RF wireless receiving module according to an embodiment of the present invention.

Fig. 4 is a driving circuit diagram of the main power circuit in the embodiment of the present invention.

Fig. 5 is a circuit diagram of detecting current in an embodiment of the present invention.

Fig. 6 is a circuit diagram of detecting voltage in an embodiment of the present invention.

Fig. 7 is a circuit diagram for detecting average current in an embodiment of the present invention.

Fig. 8 is a circuit diagram related to hardware overcurrent protection according to an embodiment of the present invention.

Fig. 9 is a circuit diagram of an AC-DC step-down 12V in an embodiment of the present invention.

Fig. 10 is a schematic diagram of a housing structure in an embodiment of the present invention.

In the figure: the system comprises a 1-AC power supply standard interface, a 2-lamp set interface, a 3-three-phase motor interface and a 4-RF antenna.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only 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: please refer to fig. 1, a high-voltage ceiling fan controller, comprising an MCU main control module, a buzzer, an RF wireless receiving module, a current detecting module, a voltage detecting module, a half-bridge driving module, a protection module and a dc brushless motor, wherein the MCU main control module is respectively connected with the buzzer, the RF wireless receiving module, the current detecting module, the voltage detecting module, the half-bridge driving module and the protection module, the half-bridge driving module is further connected with the dc brushless motor through an NMOS tube, the dc brushless motor is further connected with a double-resistance current sampling module and a protection module, and the double-resistance current sampling module is further connected with the MCU main control module.

The brushless direct current motor is a high-voltage three-phase brushless direct current motor.

The wireless remote control module is a wireless radio frequency remote controller and is used for transmitting wireless 433M control signals.

The wireless receiving module is arranged on the power control mainboard and receives a wireless 433M control signal transmitted by the wireless remote control module.

The control unit is an MCU chip, the chip controls the normal operation of the motor by detecting a sampling current signal, and hardware overcurrent protection, software overcurrent protection, overvoltage protection, undervoltage protection, locked rotor protection and open-phase protection are arranged. The chip supports FOC sine wave control of the direct current brushless motor, and solves the problem of overlarge noise when the motor runs.

The utility model discloses the power input of example is AC220V 50Hz, adopts non-isolation auxiliary power supply AC-DC to step down 12V scheme, provides normal operating voltage for main control chip peripheral circuit, ensures that control is normal to the cost has been saved greatly, as shown in figure 9. On the other hand, the AC220V input is rectified by D1 and the high dc voltage is used as the driving voltage of the motor, i.e. the power supply of the half bridge. The high-voltage VP is conducted to GND through a switch of the MOS, sampling resistors RS1 and RS2 are arranged, currents of two phases of three phases of the high-voltage VP are sampled, the switching time of the MOS tube is calculated through control of a chip FOC algorithm, and control over the motor is achieved. And an RS3 sampling resistor is arranged to detect the current of the whole current loop and provide data for a chip program, so that overcurrent protection is realized. As shown in fig. 5, AMP1P is an operational amplifier equidirectional terminal, AMP1P is an operational amplifier inverting terminal, the sampled current I _ shunt amplifies the voltage through the operational amplifier, AMP1O is an output terminal of the operational amplifier, and the main control chip samples the voltage of the AMP1O pin, so that the current value of the current load can be calculated. VHALF provides the bias voltage of 2.5V to adopt the differential line in the PCB, improve the accuracy of current sampling. Since the motor is an inductive load, the fluctuation of the sampled current is relatively large, ITRIP in fig. 7 is a sampled voltage of an average current, and the loop sampling current AMP1O obtains a stable voltage value after RC filtering by resistors R21 and C12. FIG. 8 shows a hardware overcurrent circuit, where CMP1M is the inverting terminal of the comparator, AMP1O is the inverting terminal of the CMP1P comparator, the high output from the output terminal is overcurrent, and the low output is normal. Once the current suddenly changes and exceeds the set threshold, the comparator directly cuts off the output control signal of the main control chip, the MOS main power loop is disconnected, and the controller is protected. Fig. 6 is a circuit for detecting voltage, VP reduces the voltage to the voltage detectable by the main control chip through the voltage division of R33, R34 and R35, so as to implement the protection of overvoltage and undervoltage. The locked rotor protection is realized by detecting back electromotive force (Ke) and three-phase total current, and when one of the two exceeds a set threshold value, the locked rotor protection is judged, and the master control PWM sine wave signal output is cut off. If the locked rotor frequency is not greater than the set value, restarting the motor; otherwise, the program turns off the output and is recovered after power-on. The current of the sampling resistor R7 is detected and returned to the control unit for comparison, when the current is smaller than the set minimum value, the phase failure is judged, the main control PWM sine wave signal output is cut off, and if the phase failure times are not larger than the set value, the motor is restarted; otherwise, the power can be restored after being powered on again.

Embodiment 2, on the basis of embodiment 1, the brushless dc motor drive of this design is provided with a protection circuit on the motor drive board, and overcurrent protection, overvoltage and undervoltage protection, open-phase protection and locked rotor protection are realized through the protection circuit, and in case the brushless dc motor overcurrent, overvoltage, undervoltage, open-phase and locked rotor protection appear, the protection circuit detects a threshold signal and returns to the control unit to turn off 6 paths of PWM sine wave signal outputs, thereby protecting the motor drive board and the brushless dc motor from being damaged.

Example 3: on the basis of embodiment 1, the design adopts high voltage non-isolation, so that some sensitive elements are easily affected by current noise to destroy the normal operation of the circuit. In the PCB design, ground plane segmentation is adopted, and the digital ground and the analog ground are mutually separated, so that influence on a circuit caused by impure ground signal crosstalk is effectively avoided. And adopt the device of crossing strong current to place the bottom surface, place the front with the device of weak signal, adopt the electric capacity diversification, effectively avoid the interference between the signal, improve the actual effect of filtering.

Example 4, in addition to example 1, the external structure of the present design is shown in fig. 10, in which: the shell is respectively provided with an AC power standard interface 1, a lamp group interface 2, a three-phase motor interface 3 and an RF antenna 4.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a high-pressure ceiling fan controller, includes MCU host system, bee calling organ, RF wireless receiving module, detection current module, detection voltage module, half-bridge drive module, protection module and DC brushless motor, a serial communication port, MCU host system connects bee calling organ, RF wireless receiving module, detection current module, detection voltage module, half-bridge drive module and protection module respectively, and half-bridge drive module still connects DC brushless motor through NMOS pipe module, still is connected with double resistance current sampling module and protection module on the DC brushless motor, and MCU host system is still connected to double resistance current sampling module.

2. The high voltage ceiling fan controller of claim 1, wherein the MCU master control module further comprises an interface module, wherein the interface module comprises a programming interface and an SPI communication interface.

3. The high voltage ceiling fan controller of claim 1, wherein the protection module comprises hardware overcurrent protection, software overcurrent protection, overvoltage protection, undervoltage protection, locked rotor protection, and open phase protection.

4. The high voltage ceiling fan controller of claim 1, wherein the brushless DC motor is powered with 314V DC.

5. The high voltage ceiling fan controller of any one of claims 1 to 4, wherein the MCU master control module and the half bridge drive module are powered with 12V DC.

6. The high voltage ceiling fan controller of claim 1, wherein said NMOS transistor module uses 6 high voltage N-MOSFETs to form three half bridge drives.

7. The high voltage ceiling fan controller of claim 1, wherein the half bridge drive module employs an ID5S609 half bridge drive chip drive NMOS.

8. The high pressure ceiling fan controller of claim 1, wherein the RF wireless remote control transceiver module is an RXB35 module.

9. The high voltage ceiling fan controller of claim 1, wherein the MCU master control module is a FU6811L high voltage DC brushless motor driver chip, and the MCU master control module comprises a crystal oscillator, a reset circuit, a programming interface and an SPI communication interface.