KR20160007845A - BLDC FAN motor drive control system - Google Patents

Abstract

The present invention relates to a BLDC fan motor drive control system of heating, ventilation and air conditioning equipment for controlling an air flow and a condition. The BLDC fan motor drive control system comprises: a micro controller unit (MCU) operating to perform speed control, current control and input-output control of a BLDC motor; an interface unit receiving signals of the MCU and applying a signal by sensing a statue of the current, a speed command for the BLDC motor or a cooling fan, and a signal for displaying states of the BLDC motor and the cooling fan; a power converting unit receiving the signals of the MCU and converting three-phase AC common power into AC power of variable frequency and variable voltage (or variable current) which is appropriate for driving a synchronous motor; a switching mode power supply (SMPS) electrically connected to the MCU and the power converting unit, generating a large power capacity AC by an oscillation circuit in DC power, rectifying the generated large AC power to a current of different voltage, applying the current with the DC power to the power converting unit, and applying signals resulting from detection of overcurrent, overheat and errors to the MCU; the BLDC motor of which the drive force is controlled by a signal of the power converting unit, and in which a current detection circuit, a protection circuit, a drive circuit, and a large scale integrated circuit are installed; and the cooling fan coupled to the BLDC motor and rotated by the drive force of the BLDC motor.

Description

BLDC FAN motor drive control system [0002]

The present invention relates to a structure of a drive control system of a BLDC fan motor, and more particularly, to a structure of a drive control system of a BLDC fan motor. More particularly, The present invention relates to a drive control system for a BLDC FAN motor, which is capable of confirming a fault signal including a fault,

A BLDC motor is a rotary-type BLDC motor in which a field armature winding is on the stator side and a permanent magnet field is rotated.

The BLDC motor always has a sensor that detects the absolute position of the field stimulation and detects the position of the field stimulation at all times, and causes the current to flow sequentially through the armature winding by the signal.

Generally, the counter electromotive force is electrically designed to have a constant Em for 1/2 period and longer than the 120-degree period, and the constant current Im is electrically applied to the flat portion of the counter electromotive force for 1/2 period to 120 占 period.

The sequential cyclic switching from one phase to another phase of a three-phase BLDC motor is determined by the current position of the armature conducting current and the position of the magnetic pole of the crab.

It is a position detector that outputs six absolute position information per rotation electrically in a three-phase BLDC motor drive system. It is composed of a magnet and a Hall element of a magnetic encoder.

The torque and speed of the three-phase BLDC motor are controlled by the voltage and current supplied to the armature winding.

In a three-phase BLDC motor, the phase angle between the magnitude of the armature current, the current and the counter electromotive force is controlled, the magnitude of the armature voltage, and the phase angle between the voltage and the counter electromotive force are controlled to control the torque and speed.

Here, the fundamental wave phase of the armature current is matched with the fundamental and phase of the counter electromotive force, and only the magnitude of the current is controlled.

In order to generate a constant torque without pulsation, a square-wave current of a certain size proportional to the torque command is electrically maintained in a flat part of the trapezoidal counter electromotive force for 1/2 period to 120 ° period.

The conventional three-phase BLDC motor requires a separate gate drive circuit for protecting the device from gating while simultaneously providing a fault signal such as overcurrent, overheating, short circuit, and insufficient control voltage.

Korean Published Patent Application No. 2009-0049283 (published on May 18, 2009)

According to an aspect of the present invention, there is provided a method of controlling a semiconductor device, including the steps of: detecting a fault signal including an overcurrent, an overheat, a short circuit, So that it is possible to perform a quick failure process.

According to the present invention, a control signal is output according to a result of performing an operation based on input data, and an internal time required for the control is calculated, or the control state of the system is output to the outside, And a drive control system of a BLDC FAN motor which is capable of controlling input / output control.

According to an aspect of the present invention, there is provided a drive control system for a BLDC fan motor, including: a microcontroller unit (MCU) for performing speed control, current control, and input / output control of a BLDC motor; An interface unit for receiving a signal from the microcontroller unit (MCU) to sense a current state, a speed command of a BLDC motor or a cooling fan, a BLDC motor, and a signal for displaying a state of a cooling fan ; A power control unit including a Programmable ASIC (Application Specific IC), which is a digital logic circuit, for receiving a signal of MCU (Micro Controller Unit) and facilitating the processing of a gate signal required for the PWM inverter; A power conversion unit that receives a signal of a programmable ASIC (application specific integrated circuit) and converts the AC commercial power supply to a starting power having a frequency and a voltage (or current) suitable for driving the BLDC motor; A DC power source which is electrically connected to the MC oil and the power conversion unit, generates an AC having a large power capacity by an oscillation circuit in the DC power source, converts the generated large AC power into an alternating current of a different voltage and rectifies the DC power, A converter unit for applying a negative current; A BLDC motor in which a driving force is controlled by a PWM signal of the power conversion unit and a magnetic hall sensor is installed to sense and control a real time speed of the BLDC motor through six switches for a full bridge circuit; And a cooling fan coupled to the BLDC motor and rotated by a driving force of the BLDC motor.

The power conversion unit of the present invention includes an EMI filter installed on a power line to control the rotation speed of the BLDC motor and the rotation speed of the BLDC motor. An IGBT (Insulated Gate Bipolar Transistor) power conversion module for supplying starting power to the motor; A driver gate circuit for facilitating gate signal processing required for the inverter; A drive control system of a BLDC FAN motor is provided that includes an idc current sensor (DC LINK current sensor) that measures the voltage drop across the resistor by installing a low resistance in series between the PWM inverter and the converter.

In order to maintain a constant switching frequency, the PWM inverter of the present invention generates a PWM signal by comparing the amplification of the current error with the triangular wave frequency, controls the amount of voltage or current by the duty ratio of the pulse, And a drive control system of the BLDC FAN motor is provided which prevents unnecessary power consumption and heat generation in the control and control processes.

The interface unit of the present invention includes an inverter commutation connected to the PWM inverter so as to be able to electrically apply an electric signal, the inverter commutating the IGBT (Insulated Gate Bipolar Transistor) sequentially, and applying a signal to rotate the motor. Current control that is electrically connected to the inverter and PI speed controller, detects the overcurrent by the detection signal of the high-power DC bus, and controls the magnitude of the current to control the torque; PI (proportional plus integral) speed control which is electrically connected to current control, speed meter and speed command and controls the speed of BLDC motor by controlling DC link current according to motor speed; A speed meter electrically connected to the PI speed controller for measuring an intensity of a magnetic field and converting an applied signal frequency into a current; A speed command for applying a PMW signal, a DC power supply, a temperature or a signal applied through an external controller unit to the PI speed controller, the amplification of the error of the current being compared with the triangular wave frequency; And a temperature control for checking the temperature of the BLDC motor and applying a signal to the speed command about a phenomenon of temperature in real time in real time.

The speed meter of the present invention converts a frequency to a current by a frequency / voltage (F / V) circuit using a Hall device for measuring the strength of a magnetic field. Drive control system.

In the present invention, an idc sensor (DC link) is installed between the PWM inverter of the power conversion unit and the converter, and the idc sensor is connected to the control of the Programmable ASIC (Application Specific IC) to control the torque of the BLDC motor. And a control unit for controlling the control unit.

The present invention further includes a display electrically connected to the BLDC motor and having a button formed therein for controlling the setting of the speed of the cooling fan, wherein the display includes a display unit The display unit is provided with a run and a set which display a simple speed in numerals or in a temperature form and to grasp the operation state of the BLDC motor or to display the change in the setting of the BLDC motor, ) Is displayed.

The present invention further includes an external controller connected to the interface unit so as to control the BLDC motor through wire or wireless, and configured to change the setting of the BLDC motor and to grasp the current driving state of the BLDC motor. Control system.

The external controller of the present invention includes a PC or a smart phone connected to a BLDC motor through a wired or wireless connection and including a notebook desktop or tablet PC for changing the setting of the BLDC motor and checking the current driving status .

The present invention performs operations based on various input / output data in order to perform speed control, current control, and input / output control of a BLDC motor, and outputs a control signal to the inverter in accordance with the calculation result, Or the control state is output to the outside, thereby controlling the torque according to the speed of the cooling fan and the amount of airflow, thereby achieving independent driving.

The present invention has the effect of controlling the dc link current by controlling the magnitude of the current to control the torque, performing the PWM according to the output of the inverter, and the torque control by using only one current sensor.

The present invention has the effect of facilitating the processing of the gate signal required for the inverter by incorporating the drive gate circuit together with the SPM power conversion.

The present invention has the effect of sensing the speed of a BLDC motor in real time by a switch for a full bridge circuit and a magnetic hall sensor.

The present invention can prevent the gating at the same time while giving fault signals such as overcurrent, overheating, short circuit, and control voltage to the device without applying a separate gate drive circuit. Therefore, it is possible to safely protect the device, There is an easy effect.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a drive control system of a BLDC fan motor according to the present invention; FIG.
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a BLDC motor for a cooling / heating air conditioner,
3 is a diagram showing a configuration for controlling torque by controlling a current in a drive control system of a BLDC FAN motor according to the present invention.
FIG. 4 is a view showing a structure for controlling the speed of a drive control system of a BLDC fan motor according to the present invention; FIG.
5 is a diagram showing a driver control sequence of a drive control system of a BLDC FAN motor according to the present invention.
6 is a view showing a first use state of the drive control system of the BLDC FAN motor of Fig.
7 shows a second use state of the drive control system of the BLDC fan motor of Fig. 6; Fig.
8 is a diagram showing a third use state of the drive control system of the BLDC FAN motor of Fig.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail.

It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Like reference numerals are used for similar elements in describing each drawing. The terms first, second, etc. may be used to describe various components, but the components are not limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

For example, the term "and / or" includes any combination of a plurality of related listed items or any of a plurality of related listed items.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the meaning in the context of the relevant art and are to be construed in an ideal or overly formal sense unless expressly defined in the present application Should not.

The specific terminology used in the following description is provided to aid understanding of the present invention, and the use of such specific terminology may be changed into other forms without departing from the technical idea of the present invention.

Hereinafter, the structure of a drive control system of a BLDC FAN motor according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram showing the configuration of a drive control system of a BLDC FAN motor according to the present invention.

1, a drive control system of a BLDC FAN motor according to the present invention will be described with reference to FIG. 1. The drive control system of a BLDC FAN motor according to the present invention includes an MCU (Micro Controller Unit) 100, A power control unit 300, a power conversion unit 400, a BLDC motor 500, a cooling fan 600, a display 700, an external control unit 800, and a converter unit 900 .

The microcontroller unit (MCU) 100 is connected to the interface unit 200 through various input / output data to perform speed control, temperature control, and input / output control of the BLDC motor 500 And applies a control signal to the power control unit 300 according to the calculation result to calculate an internal time required for the control or to output the control state of the drive control system of the BLDC motor 500 to the outside.

The interface unit 200 inputs and outputs a command signal applied from the external controller 800 to output a signal indicative of the driving state of the BLDC FAN motor, a speed command of the BLDC motor 500 or a cooling fan, a BLDC motor 500, A signal is applied to the external controller 800 so that the state of the cooling fan 600 can be displayed. Also, the interface unit 200 may input and output signals related to the operation, detection signals, and the like between the MC 100 and the power controller 300 or the BLDC motor 500, And an external controller 800 to interface with the MCU 100 when various signals such as overcurrent, overheat, and error detection are applied.

The power control unit 300 is electrically connected to the interface unit 200 and the power conversion unit 400. The power control unit 300 is a programmable ASIC (Digital Logic Circuit), which is a digital logic circuit, to facilitate hardware configuration and correction, Application Specific IC) to generate the PWM signal by comparing the amplification of the current error with the triangular wave frequency (the triangular wave is equal to the switching frequency) in order to keep the switching frequency constant. In addition, the power control unit 300 controls the amount of voltage or current by the duty ratio of the pulse, thereby preventing unnecessary power consumption and heat generation in the control process. The configuration of the power controller 300 will be described in more detail with reference to FIG.

The power conversion unit 400 is electrically connected to the power control unit 300 and the BLDC motor 500. The power conversion unit 400 is installed on a power line to be connected to the power conversion unit 400. To maintain the PWM switching frequency constant, And PWM inverter to prevent unnecessary power waste and heat generation in the control process by controlling the amount of voltage or current by the duty ratio of the pulse to generate the PWM signal and to supply the starting power to the motor IGBT switching power converter module and driver gate circuit which facilitates the processing of the gate signal required for the inverter, idc current sensor which measures by using voltage drop generated in resistance by installing low resistance in series between PWM inverter and converter part (DC LINK Current sensor).

In order to prevent the BLDC motor 500 from being damaged by the inrush current when the BLDC motor 500 is started, the BLDC motor 500 is driven with a low voltage. (500).

The BLDC motor 500 includes a main board for controlling and a power board for supplying power. The current detection circuit, the protection circuit, the drive circuit, and the high-density integrated circuit are directly coupled to the inside of the motor so as to improve reliability, high density integration, and small size and weight. In addition, it further includes a magnetic hall sensor for sensing and controlling the real time speed of the BLDC motor 500 through six switches for a full bridge circuit.

The cooling fan 600 is installed on one side of the BLDC motor 500 and rotates at a constant speed by driving the BLDC motor 500.

The display unit 700 is electrically connected to the BLDC motor 500 and includes a button for controlling the setting of the speed of the cooling fan 600. In addition, the display unit 700 includes a display unit to allow the user to determine the current speed of the cooling fan.

The display unit may display a simple speed in numerical or temperature form. In addition, the display unit may display a run and a set for displaying an operation state of the BLDC motor 500 or grasping the operation of the BLDC motor 500 when the setting of the BLDC motor 500 is changed.

The external controller unit 800 is connected to the interface unit 200 through wired or wireless communication and includes a notebook PC or a tablet PC so as to change the setting of the BLDC motor 500, PC or smart phone.

The PC or smart phone is configured in one image form, that is, an icon or an application form, so that the driving state, the setting change, and the like of the BLDC motor can be performed, and the application including the operation state, the stop state, State, setting change, and the like.

The converter unit 900 is electrically connected to the MCU 100, the interface unit 200, the power control unit 300, and the power conversion unit 400. The converter unit 900 includes an EMI A diode rectifying section 920 for controlling a filter 210, a conversion between AC and DC, a frequency conversion of AC, a conversion of a constant, etc., and a DC converter A PFC / smoothing circuit 930 for smoothing to a DC power without ripple so as to obtain a power source and smoothing the current, and a PFC / smoothing circuit 930 electrically connected to the EMI filter 210 and the converter 220 detects the phase failure of the AC input power source to shut off the driving power of the BLDC motor 500 when the single-phase input fails. When the phase is restored, the BLDC motor 500 is again driven independently.

FIG. 2 is a diagram illustrating a flow of a zeo signal between a power conversion unit and an interface unit of a BLDC fan motor for an air conditioning and heating system according to the present invention.

Referring to FIG. 2, the present invention mainly includes a power conversion unit 400 and an interface unit 200 for controlling a BLDC motor.

The converter unit 900 includes an EMI filter 910, a diode rectifier circuit 920, a PFC / smoothing circuit 930, and an RTC phase detection sensor 950.

The EMI filter 910 is installed on the incoming power line, and removes the noise included in the normal current. The EMI filter 210 is composed of any one of a switching TR, a FET, and a rectifier diode. Preferably, using a synchronous rectification scheme using FETs results in a significant increase in efficiency. However, in the case of a switching device, a saturating voltage or Ron resistance at ON, a leakage current at OFF, and a joule loss when the signal transitions (ON-> OFF or OFF-> ON) Since the linear interval is a linear period during the transition time, the joule loss of P = IR is generated in the moving direction. Therefore, as the transition time is shortened, harmonics are generated more frequently and loss is generated.

The diode rectifier circuit 920 is installed on the incoming power line, and rectifies the AC commercial power source in a state in which noise is removed from the EMI filter 210 to convert it into DC power.

The PFC / smoothing circuit 930 is installed on the incoming power line, and reduces the ripple current of the AC component included in the DC power applied from the diode rectifier circuit 920.

The PFC (Power Factor Correction) / smoothing circuit 930 is electrically connected to the diode rectifier circuit 920, the converter unit 900 and the power conversion unit 400, and the diode rectifier circuit 920 When the current waveform in the power source is pulsed rather than sinusoidal, it is necessary to reduce the backward current by the load to improve the power factor, to supply the necessary current stably to each part, reduce unnecessary power consumption, .

The RTC phase detection sensor 950 is electrically connected to the power control unit 300 and is installed between the EMI filter 910 and the diode rectifier circuit 920 to detect the phase failure of the AC input power first Protect the system.

The interface unit 200 inputs and outputs a signal and a signal applied from the external controller 800 to the display 700 and outputs a signal indicative of the state of the current and a speed command of the BLDC motor 500 or the cooling fan 600 , The BLDC motor 500, and the cooling fan 600 are displayed. The interface unit 200 inputs and outputs signals and detection signals according to operations between the MCM 100, the power conversion unit 400 and the BLDC motor 500, And performs an interface function to display an operation state or to apply various signals to the MCU 100 by the external controller unit 800.

The power control unit 300 includes an inverter commutation 310, a current control 320, a PI speed control 330, a speed meter 340, a speed command 350, and a temperature control 360.

The inverter commutation 310 is connected to the power conversion unit 400 so as to be electrically connected to the inverter 400 and turns on and off the IGBT in order to allow the BLDC motor 500 to rotate.

The current control 320 is electrically connected to the inverter commutation 310 and the PI speed controller 330 and is connected to the PWM inverter of the power conversion unit 400 and the converter unit 900, Link current sensor). It detects the overcurrent by detection signal of the high-power DC bus and controls the torque by controlling the magnitude of the current.

The proportional plus integral (PI) speed control 330 is electrically connected to the current control 320, the speed meter 340 and the speed command 350 and controls the DC link current according to the speed of the BLDC motor 500 And controls the speed of the BLDC motor 500.

The speed meter 340 converts a frequency of the applied signal into a current by using a frequency / voltage (F / V) sensor using a Hall element 341 for measuring the strength of the magnetic field, 330).

The speed command 350 is a command to output a PWM signal (a PMW signal obtained by comparing amplification of a current error with a triangular wave frequency (switching frequency)), a DC power source, a temperature or a signal applied through the external controller unit 800 to a PI speed controller .

The temperature control 360 checks the temperature of the BLDC motor 500 and applies a signal to the speed command 350 about a phenomenon of temperature in real time.

As described above, even if a separate gate drive circuit is not designed and applied, a fault signal including an overcurrent, an overheat, a short circuit, a shortage of a control voltage is applied to an external controller and simultaneously gating is prevented. There is a quick process for failure.

FIG. 3 is a view illustrating a configuration for controlling a torque of a drive control system of a BLDC FAN motor according to the present invention by controlling the current.

3, when the commercial AC power is applied to the diode rectifier circuit 920 to apply power to the BLDC motor 500, the diode rectifier circuit 920 converts the commercial AC power to the DC power And supplies the DC power obtained through the rectifying operation to the power converting unit 400 to obtain the DC power from the AC power source.

In the power conversion unit 400, the DC power is again supplied to the BLDC motor 500 by modulating the pulse width by modulating the output time width.

The signal driven by the BLDC motor 500 is measured through a hall sensor 341 and a measured signal is applied to the current control unit 320. The signal applied to the current controller 320 detects the overcurrent by the detection signal of the high-power DC bus, and controls the magnitude of the current to apply the PWM signal for controlling the torque to the inverter commutation 310.

The inverter commutation 310 sequentially turns on and off the IGBT switching device and applies an electrical signal to the power conversion unit 400 so that the BLDC motor 500 can rotate.

FIG. 4 is a diagram illustrating a structure for controlling the speed of the drive control system of the BLDC FAN motor according to the present invention.

4, the present invention relates to control for implementing speed control when the dc link current control is performed by the Curret control 320 together with the PI speed control 330 .

And receives a signal corresponding to a speed command applied from the external controller unit 800 and a speed signal corresponding to the air flow rate of the cooling fan 600.

The PI speed controller 330 compares the speeds applied by the external controller 800 and the cooling fan 600 and determines whether the speed of the current cooling fan 600 is appropriate or appropriate And applies a signal to the current controller 320.

The current controller 320 is electrically connected to the PI speed controller 330 and is connected to idc sensing installed between the converter unit 900 and the power conversion unit 400 so that the high- And the PWM signal for controlling the torque by controlling the magnitude of the current is applied to the inverter commutation 310.

The inverter commutation 310 sequentially turns on and off the IGBT switching device so that the BLDC motor 500 can be rotated by applying an electrical signal to the BLDC motor 500, So that the speed and torque of the cooling fan 600 can be controlled.

5 is a diagram illustrating a driver control sequence of the drive control system of the BLDC FAN motor according to the present invention.

5, the converter 220 converts the commercial AC power to DC power and converts the DC power into a synchronous coordinate system to obtain effective error elimination and quick response characteristics in a steady state, and controls the AC / The process of detecting DC bus input power (S10) is performed. At this time, if there is no detection of the AC / DC bus input power, the process of repeating step S10 for detecting the AC / DC bus input power continues. When the AC / DC bus input power is applied, power is applied to the power conversion unit 400 through the interface unit 300 and is applied to the BLDC motor 500.

When the AC / DC bus input power is applied, the converter unit 400 detects the control power from the power conversion unit 400, and performs intermittent control at a frequency. The AC / DC bus input power is supplied to the PFC / smoothing circuit 230, (S20) of detecting the control power source from the voltage.

A step S30 of detecting whether a short circuit including an overcurrent, an overheat or an error signal has occurred in the power converter 400 and the IGBT is performed. If a short circuit occurs, the power of the PWM inverter of the power converter 400 is cut off The current driving state of the LBDC motor 500 is maintained.

A step S40 of sensing the set temperature of the external controller 800 through the temperature sensor by the rotation of the BLDC motor 500 is performed. If the sensed temperature is within the set temperature, the controller maintains the current rotation state and controls the temperature to be lowered to the temperature set by the external controller when the sensed temperature is high.

When the temperature sensed in S40 is high, the current speed and torque are calculated so as to control the speed and torque of the cooling fan 600, and the BLDC motor 500 (Step S50).

A step S60 of measuring the real time speed of the fan according to the temperature and the air volume by the cooling fan 600 rotated by the BLDC motor 500 is performed. In step S60, the speed of the cooling fan 600 is checked in real time and the temperature is checked. If the temperature is within the set temperature, the current state is maintained. If the temperature is higher than the set temperature, So as to lower the temperature.

A step S70 of detecting a position of an input terminal, a ground terminal, and an output terminal of the BLDC motor 500 is performed. In step S70, the magnetic field is detected to control the speed of the cooling fan 600 in accordance with the rotation of the cooling fan 600. [

The steps S50, S60, and S70 are repeated in order to smoothly drive the cooling fan 600 that rotates by the driving force of the BLDC motor 500.

As shown in FIG. 5, the drive control system of the BLDC FAN motor according to the present invention can be configured in various forms as shown in FIGS. 6, 7 and 8.

The present invention is not limited to the configurations shown in Figs. 6, 7 and 8, and the configuration may be different depending on the place of installation or the manufacturer.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

100: MC 200: interface unit
300: power control unit 310: inverter commutation
320: Current control 330: PI speed control
340: Speed meter 341: Hall element
350: Speed Command 360: Temperature Control
361: Temperature sensor 400: Power converter
500: BLDC motor 600: Cooling fan
700: Display unit 800: External control unit
900: Converter section 910: EMI filter
920: diode rectifier circuit 930: PFC / smoothing circuit
940: RTC phase detection sensor

Claims (9)

A drive control system for a BLDC fan motor,
Microcontroller Unit (MCU) for speed control, current control, and input / output control of BLDC motor;
An interface unit for receiving a signal from the microcontroller unit (MCU) to sense a current state, a speed command of a BLDC motor or a cooling fan, a BLDC motor, and a signal for displaying a state of a cooling fan ;
A power control unit including a Programmable ASIC (Application Specific IC), which is a digital logic circuit, for receiving a signal of MCU (Micro Controller Unit) and facilitating the processing of a gate signal required for the PWM inverter;
A power conversion unit that receives a signal of a programmable ASIC (application specific integrated circuit) and converts the AC commercial power supply to a starting power having a frequency and a voltage (or current) suitable for driving the BLDC motor;
A DC power source which is electrically connected to the MC oil and the power conversion unit, generates an AC having a large power capacity by an oscillation circuit in the DC power source, converts the generated large AC power into an alternating current of a different voltage and rectifies the DC power, A converter unit for applying a negative current;
A BLDC motor in which a driving force is controlled by a PWM signal of the power conversion unit and a magnetic hall sensor is installed to sense and control a real time speed of the BLDC motor through six switches for a full bridge circuit;
A cooling fan coupled to the BLDC motor and rotated by a driving force of the BLDC motor;
And the drive control system of the BLDC FAN motor.
The method according to claim 1,
Wherein the power conversion unit comprises:
An EMI filter installed on the incoming power line to control the rotation speed of the BLDC motor and the rotation speed of the BLDC motor;
An IGBT (Insulated Gate Bipolar Transistor) power conversion module for supplying starting power to the motor;
A driver gate circuit for facilitating gate signal processing required for the inverter;
An idc current sensor (DC LINK current sensor) that measures the voltage drop across the resistor by placing a low resistance in series between the PWM inverter and the converter;
The drive control system of the BLDC FAN motor.
3. The method of claim 2,
The PWM inverter includes:
In order to keep the switching frequency constant, the PWM signal is generated by comparing the amplification of the current error with the triangular wave frequency,
The pulse duty ratio controls the amount of voltage or current,
And a drive control system for a BLDC FAN motor, characterized in that unnecessary power waste and heat generation in smooth control and control processes are prevented.
The method according to claim 1,
The interface unit includes:
An inverter commutation connected to the PWM inverter so as to be able to electrically apply the signal and sequentially applying a signal to the motor so that the IGBT (Insulated Gate Bipolar Transistor) turns on and off sequentially;
Current control that is electrically connected to the inverter and PI speed controller, detects the overcurrent by the detection signal of the high-power DC bus, and controls the magnitude of the current to control the torque;
PI (proportional plus integral) speed control which is electrically connected to current control, speed meter and speed command and controls the speed of BLDC motor by controlling DC link current according to motor speed;
A speed meter electrically connected to the PI speed controller for measuring an intensity of a magnetic field and converting an applied signal frequency into a current;
A speed command for applying a PMW signal, a DC power supply, a temperature or a signal applied through an external controller unit to the PI speed controller, the amplification of the error of the current being compared with the triangular wave frequency;
BLDC A temperature control that checks the temperature of the motor and signals the temperature command in real time to the speed command.
And the drive control system of the BLDC FAN motor.
5. The method of claim 4,
Wherein the speed meter converts a frequency to a current by a frequency / voltage (F / V) circuit using a Hall device for measuring a strength of a magnetic field. .
The method according to claim 1,
An idc sensor (DC Link) is installed between the PWM inverter of the power conversion section and the converter,
Wherein the idc sensor is connected to a negative control of a programmable ASIC (Application Specific IC) to control a current to control a torque of the BLDC motor.
The method according to claim 1,
Further comprising a display unit having a button for controlling the setting of the speed of the cooling fan, the display being electrically connected to the BLDC motor,
The display unit is configured to display a current speed of the cooling fan,
The display unit displays a run and a set that displays a simple speed in numbers or in a temperature form and grasps the operation status of the BLDC motor or displays the change in setting of the BLDC motor And the drive control system of the BLDC FAN motor.
The method according to claim 1,
An external controller connected to the interface unit for controlling the BLDC motor through wired or wireless, and for changing the setting of the BLDC motor and determining the current driving state;
Further comprising: a drive control system for a BLDC FAN motor.
9. The method of claim 8,
The external controller includes:
Connected to the BLDC motor via wire or wireless,
A PC or smartphone that includes a laptop desktop or tablet PC to change the settings of the BLDC motor, to determine the current running status;
And the drive control system of the BLDC FAN motor.

Images