WO2024058336A1

WO2024058336A1 - Refrigerator including control device for controlling driving of motor and method of controlling same

Info

Publication number: WO2024058336A1
Application number: PCT/KR2023/006567
Authority: WO
Inventors: 미야케히로유키; 이대성; 박성인; 윤효진; 신효재; 이예은
Original assignee: 삼성전자 주식회사
Priority date: 2022-09-13
Filing date: 2023-05-15
Publication date: 2024-03-21
Also published as: JP2024040616A

Abstract

The present disclosure provides a refrigerator including a control device for controlling driving of a motor and a method of controlling same. The refrigerator according to the present disclosure includes: a storage compartment; a door configured to open and close one open side of the storage compartment; a cold air supply device that generates cold air through a freeze cycle including compression, condensation, expansion, and evaporation processes of a refrigerant, and supplies the cold air to the storage compartment; a motor used to drive a compressor included in the cold air supply device; and a control device that controls driving of the motor, wherein the control device includes: an inverter unit including a plurality of switches that switch a coil through which current flows among a plurality of coils included in the motor; and a processor for square wave control of the inverter unit, wherein the processor may determine a torque correction amount used to smooth the speed of the motor, set a first conduction angle of the plurality of switches in a first mechanical angle range constituting one cycle of the mechanical angle of a rotor of the motor and a second conduction angle of the plurality of switches in a second mechanical angle range excluding the first mechanical angle range, and set the second conduction angle to be greater than the first conduction angle.

Description

Refrigerator including a control device for controlling driving of a motor and method for controlling the same

The present disclosure relates to a refrigerator including a control device for controlling driving of a motor and a method of controlling the same.

Compressors used in refrigerators, etc. perform a suction stroke to fill the refrigerant in the cylinder, a compression stroke to compress the refrigerant in the cylinder, and a discharge stroke to discharge the compressed refrigerant to the outside of the compressor, causing vibration and noise due to changes in load. There is a problem with this growing larger. Additionally, a control device that can drive the motor with high efficiency after suppressing the vibration and noise of the compressor has been proposed as a control device for the compressor motor.

For example, the control device described in Patent Document 1 includes an inverter section that supplies power to a three-phase brushless motor with a rotor and a detection section that detects the mechanical angle of the rotor. In addition, the control device stores in advance in an internal memory circuit a correction value corresponding to the mechanical angle, which is determined to suppress pulsation that occurs in either the voltage or current of the power due to the load torque of the three-phase brushless motor, and detects the correction value by the detection unit. It includes a microprocessor that controls either voltage or current based on the detected mechanical angle and a correction value corresponding to the mechanical angle.

In addition, the controller described in Patent Document 2 includes a speed controller, d-axis current command generator, voltage controller, 2-axis/3-phase converter, speed & phase estimator, 3-phase/2-axis converter, current reproduction calculator, period fluctuation suppressor, It is composed of a PWM controller, an adder/subtractor, and an adder. And the basic function of the controller is to calculate the voltage command signal applied to the motor through dq vector control and generate a PWM signal, which is the control signal of the inverter circuit.

Patent Document 1: Japanese Patent Application Publication No. 2004-215434

Patent Document 2: Japanese Patent Application Publication No. 2020-124085

A refrigerator including a control device for controlling driving of a motor according to an embodiment of the present disclosure includes a storage compartment; a door configured to open and close one open side of the storage compartment; a cold air supply device that generates cold air through a refrigeration cycle including compression, condensation, expansion, and evaporation of a refrigerant, and supplies the cold air to the storage compartment; A motor used to drive a compressor included in the cold air supply device; and a control device for controlling the driving of the motor, wherein the control device includes an inverter unit including a plurality of switches for switching a coil through which a current flows among a plurality of coils included in the motor, and a square wave control for the inverter unit. It may include a processor that The processor according to one embodiment determines the torque correction amount used to smooth the speed of the motor, and determines the first energization angle of the plurality of switches in the first mechanical angle range constituting one mechanical angle cycle of the rotor of the motor and the The second energization angle of the plurality of switches may be set in a second mechanical angle range excluding the first mechanical angle range, and the second energization angle may be set to a value greater than the first energization angle.

In one embodiment, the processor may determine the first mechanical angle range and the second mechanical angle range according to the detected speed of the motor.

In one embodiment, the processor may adjust the second energization angle according to the load of the motor.

In one embodiment, the processor may adjust the torque correction amount according to the amount of variation in motor speed.

In one embodiment, when the amount of change in the speed of the motor is less than a predetermined speed change amount value, the processor may decrease the torque correction amount compared to when the amount of change is greater than or equal to the preset speed change amount value.

In one embodiment, the processor further includes an adder that outputs a final command value using a voltage command value and a torque correction amount determined so that the speed of the motor is equal to the speed command value, and the processor is configured to determine the final command value output by the adder in a predetermined manner. If it is smaller than the lower limit, the torque correction amount can be reduced.

In one embodiment, the processor, when at least one of the first conduction angle and the second conduction angle is within a predetermined angle range, determines the timing for transitioning at least one switch among the plurality of switches from the ON state to the OFF state. Based on the advance angle, the first conduction angle and the second conduction angle may overlap.

In one embodiment, the processor further includes an adjuster that adjusts the electrical angle at which the first conduction angle and the second conduction angle overlap according to the load of the motor, and the processor adjusts the electrical angle to overlap by the angle adjusted by the adjuster. You can.

A storage room according to an embodiment of the present disclosure; a cold air supply device that generates cold air through a refrigeration cycle including compression, condensation, expansion, and evaporation of a refrigerant, and supplies the cold air to the storage compartment; A motor used to drive a compressor included in the cold air supply device; And a control method of a refrigerator including a control device for controlling driving of the motor, the operation of switching a coil through which current flows among a plurality of coils included in the motor through an inverter unit of the control device, the processor of the control device an operation of controlling the inverter unit with a square wave; an operation of determining, through the processor, a torque correction amount used to smooth the speed of the motor; and, through the processor, a first machine configuring one cycle of the mechanical angle of the rotor of the motor. It may include an operation of setting a second conduction angle for energizing a plurality of switches in a second mechanical angle range excluding the first mechanical angle range to a larger value than a first energization angle for energizing a plurality of switches in each range. You can.

In one embodiment, the method may further include determining, through a processor, a first mechanical angle range and a second mechanical angle range according to the detected speed of the motor.

In one embodiment, the operation of adjusting the second energization angle according to the load of the motor through the processor may be further included.

In one embodiment, the operation of adjusting the torque correction amount according to the amount of change in the speed of the motor through the processor may be further included.

In one embodiment, when the amount of change in the speed of the motor is less than a predetermined speed change amount value, an operation of reducing the torque correction amount may be further included when the amount of change is greater than or equal to the preset speed change amount value.

In one embodiment, an operation of outputting, through a processor, a final command value using a voltage command value and a torque correction amount determined so that the speed of the motor becomes equal to the speed command value, and the final command value output by the adder through the processor is a predetermined lower limit value. In smaller cases, an operation of reducing the torque correction amount may be further included.

In one embodiment, when at least one of the first conduction angle and the second conduction angle is within a predetermined angle range through the processor, the timing of transitioning at least one switch among the plurality of switches from the ON state to the OFF state. Based on the advance angle, an operation of overlapping the first conduction angle and the second conduction angle may be further included.

Figure 1A is a diagram showing a refrigerator according to one embodiment.

Figure 1B is a block diagram showing a refrigerator according to one embodiment.

FIG. 2 is a diagram showing an example of the schematic configuration of a control device according to the first embodiment.

Figure 3 is a diagram showing an example of the relationship between the state of the motor and the torque correction amount.

FIG. 4A is a graph showing an example of the relationship between the waveform of the induced voltage from the coil of each phase of the motor and the reference voltage.

FIG. 4B is a graph showing an example of a waveform showing the result of comparing the induced voltage and the reference voltage.

Figure 4c is a graph showing an example of the ON/OFF state of the transistor of the inverter unit based on the signal output from the signal output unit.

Figure 5(a) is a graph showing an example of the operation of the correction unit, and Figure 5(b) is a graph showing an example of the operation of the comparative example.

Figure 6 is a graph showing an example of the change in the final command value when the conduction angle is set to 150 electrical degrees in the second mechanical angle range, and the conduction angle is set to 120 electrical degrees in the first mechanical angle range.

Figure 7 is a flowchart showing a control method of a control device according to an embodiment.

Fig. 8 is a diagram showing an example of a control device according to the second embodiment.

Fig. 9 is a diagram showing an example of a control device according to the third embodiment.

Fig. 10 is a diagram showing an example of a control device according to the fourth embodiment.

Fig. 11 is a diagram showing an example of a control device according to the fifth embodiment.

The various embodiments of the present disclosure and the terms used herein are not intended to limit the technical features described in the present disclosure to specific embodiments, and should be understood to include various changes, equivalents, or replacements of the embodiments.

In connection with the description of the drawings, similar reference numbers may be used for similar or related components.

The singular form of a noun corresponding to an item may include one or more of the above items, unless the relevant context clearly indicates otherwise.

In the present disclosure, “A or B”, “at least one of A and B”, “at least one of A or B”, “A, B or C”, “at least one of A, B and C”, and “A Each of phrases such as “at least one of , B, or C” may include any one of the items listed together in the corresponding phrase, or any possible combination thereof.

The term “and/or” includes any element of a plurality of related described elements or a combination of a plurality of related described elements.

Terms such as "first", "second", or "first" or "second" may be used simply to distinguish one element from another, and may be used to distinguish such elements in other respects, such as importance or order) is not limited.

In addition, terms such as 'front', 'rear', 'top', 'bottom', 'side', 'left', 'right', 'upper', and 'lower' used in the present disclosure are defined based on the drawings. and the shape and location of each component are not limited by this term.

Terms such as “comprise” or “have” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the present disclosure, but are not intended to include one or more other features, numbers, or steps. , does not exclude in advance the possibility of the existence or addition of operations, components, parts, or combinations thereof.

When a component is said to be “connected,” “coupled,” “supported,” or “in contact” with another component, this means not only when the components are directly connected, coupled, supported, or in contact with a third component. This includes cases where it is indirectly connected, coupled, supported, or contacted through.

When a component is said to be located “on” another component, this includes not only cases where a component is in contact with another component, but also cases where another component exists between the two components.

The control device described in Patent Document 1 has room for improvement in terms of robust performance and vibration suppression.

Implementing vector control like the controller described in Patent Document 2 increases the switching loss of the inverter circuit, so there is room for improvement in terms of energy saving.

The purpose of the present disclosure is to provide a control device and a control method for realizing high robustness by improving robust performance while reducing energy consumption and improving vibration suppression performance.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

FIG. 1A is a diagram illustrating a refrigerator 2000 according to an embodiment. The refrigerator 2000 according to one embodiment may include a main body 2100, a storage compartment 2200, and a door 2300.

The main body 2100 may include an inner case, an external case disposed on the outside of the internal case, and an insulating material provided between the internal case and the external case. The inner box may include at least one of a case, a plate, a panel, or a liner that forms a storage compartment. The inner case may be formed as a single body or may be formed by assembling a plurality of plates. The outer box can form the exterior of the main body, and can be coupled to the outside of the inner box so that an insulating material is disposed between the inner box and the outer box. The insulation material can insulate the inside and outside of the storage room so that the temperature inside the storage room can be maintained at a set appropriate temperature without being affected by the environment outside the storage room. According to one embodiment, the insulation material may include a foam insulation material. A foam insulation material can be formed by injecting and foaming urethane foam mixed with polyurethane and a foaming agent between the inner and outer wounds.

According to one embodiment, the insulation material may include a vacuum insulation material in addition to the foam insulation material, or the insulation material may be composed of only a vacuum insulation material instead of the foam insulation material. The vacuum insulator may include a core material and an outer shell material that accommodates the core material and seals the interior with a vacuum or a pressure close to vacuum. However, the insulation material is not limited to the foam insulation material or vacuum insulation material described above and may include various materials that can be used for insulation.

The storage compartment 2200 may include a space limited by an internal box. The storage compartment may further include an inner box that defines a space corresponding to the storage compartment. The storage room 2200 can store various items such as food, medicine, and cosmetics. The storage compartment 2200 may be formed so that at least one side is open for loading and unloading items.

The refrigerator 2000 may include one or more storage compartments 2200. When two or more storage compartments 2200 are formed in a refrigerator, each storage compartment 2200 may have different purposes and may be maintained at different temperatures. To this end, each storage compartment 2200 may be partitioned from each other by a partition wall including an insulating material.

The storage compartment 2200 may be maintained at an appropriate temperature range depending on the purpose, and may include a refrigerating room, a freezer room, or an alternate temperature room classified according to the use and/or temperature range. The refrigerator compartment can be maintained at an appropriate temperature for refrigerating products, and the freezer compartment can be maintained at an appropriate temperature for frozen storage of products. Refrigeration can mean cooling items to cold levels without freezing them. For example, a refrigerated room can be maintained in a range of 0 degrees Celsius to +7 degrees Celsius. Freezing can mean freezing an item or cooling it so that it remains frozen. In one example, the freezer may be maintained in a range of -20 degrees Celsius to -1 degree Celsius. The alternate temperature room can be used as either a refrigerator room or a freezer room, with or without the user's choice.

The storage room 2200 may be referred to by various names such as a vegetable room, a fresh room, a cooling room, and an ice-making room, in addition to names such as a refrigerator room, a freezer room, and a cold room. Terms such as refrigerating room, freezing room, and alternating temperature room used below should be understood to encompass the storage room 2200, each having a corresponding purpose and temperature range.

According to one embodiment, the refrigerator 2000 may include at least one door 2300 configured to open and close one open side of the storage compartment 2200. The door 2300 may be provided to open and close one or more storage rooms 2200, or one door 2300 may be provided to open and close a plurality of storage rooms 2200. The door 2300 may be rotatably or slidingly installed on the front of the main body.

The door 2300 may be configured to seal the storage compartment 2200 when the door 2300 is closed. The door 2300 may include an insulating material like the main body 2100 to insulate the storage compartment 2200 when the door 2300 is closed.

According to one embodiment, the door 2300 may include a door body and a front panel that is detachably coupled to the front of the door body and forms the front of the door 2300. The door body may include a door outer plate that forms the front of the door body, a door inner plate that forms the rear of the door body and faces the storage compartment 2200, an upper cap, a lower cap, and a door insulator provided inside them.

A gasket may be provided on the edge of the inner plate of the door to seal the storage compartment by coming into close contact with the front of the main body 2100 when the door 2300 is closed. The door inner plate may include a dyke that protrudes rearward so that a door basket for storing items is mounted.

Depending on the arrangement of the door 2300 and the storage compartment 2200, the refrigerator 2000 is divided into French Door Type, Side-by-Side Type, BMF (Bottom Mounted Freezer), and TMF (Top). Mounted Freezer) or one-door refrigerator.

According to one embodiment, the refrigerator 2200 may include a dispenser provided on the door 2300 to provide water and/or ice. The dispenser may be provided in the door 2300 so that the user can access it without opening the door 2300.

FIG. 1B is a block diagram showing a refrigerator 2000 according to an embodiment. The refrigerator 2000 according to one embodiment may include a storage compartment 2200, a door 2300, a cold air supply device 2400, a motor 1100, and a control device 1.

The door 2300 according to one embodiment may be configured to open and close one open side of the storage compartment 2300. The door 2300 may be provided to open and close one or more storage rooms 2200, or one door 2300 may be provided to open and close a plurality of storage rooms 2200. The door 2300 may be configured to seal the storage compartment 2200 when the door 2300 is closed.

The cold air supply device 2400 according to one embodiment may supply cold air to the storage compartment 2200. The cold air supply device 2400 may include a machine, device, electronic device, and/or a system combining them that can generate cold air and guide the cold air to cool the storage compartment 2200.

According to one embodiment, the cold air supply device 2400 may generate cold air through a refrigeration cycle including compression, condensation, expansion, and evaporation processes of the refrigerant. To this end, the cold air supply device 2400 may include a refrigeration cycle device having a compressor 1100 capable of driving a refrigeration cycle, a condenser, an expansion device, and an evaporator. According to one embodiment, the cold air supply device 2400 may include a semiconductor such as a thermoelectric element. The thermoelectric element can cool the storage compartment 2200 by generating heat and cooling through the Peltier effect.

According to one embodiment, the refrigerator 2000 may include a machine room in which at least some parts belonging to the cold air supply device 2400 are arranged. The machine room may be arranged to be partitioned and insulated from the storage room 2200 to prevent heat generated from components placed in the machine room from being transferred to the storage room 2200. The inside of the machine room may be configured to communicate with the outside of the main body of the refrigerator (2000) to dissipate heat from the components placed inside the machine room.

According to one embodiment, the refrigerator 2000 may include a motor 1100 that drives the compressor 1000 and a control device 1 for controlling the operation of the motor 1100. The control device 1 may control the operation of the motor 1100 for driving the compressor 1000 of the refrigerator 2000. However, the present invention is not limited to this, and the control device 1 may be a device that controls the operation of a motor used in other home appliances such as air conditioners (eg, air conditioners) and washing machines. The control device 1 may include a processor 100 and an inverter unit 140.

The processor 100 can control the overall operation of the refrigerator 2000. The processor can control the components of the refrigerator 2000 by executing a program stored in the memory. The processor 100 may include a separate NPU that performs the operation of an artificial intelligence model. Additionally, the processor 100 may include a central processing unit, a graphics processor (GPU), etc. The processor 100 may generate a control signal to control the operation of the cold air supply device 2400. For example, the processor 100 receives temperature information of the storage compartment 2200 from a temperature sensor and generates a cooling control signal to control the operation of the cold air supply device 2400 based on the temperature information of the storage compartment 2200. can do.

Additionally, the processor 100 may process user input of the user interface and control the operation of the user interface according to programs and/or data memorized/stored in the memory. The user interface may be provided using an input interface and an output interface. Processor 100 may receive user input from a user interface. Additionally, the processor 100 may transmit a display control signal and image data for displaying an image on the user interface to the user interface in response to a user input.

The processor 100 and memory may be provided integrally or may be provided separately. Processor 100 may include one or more processors. For example, the processor 100 may include a main processor and at least one subprocessor.

The control device 1 may control the driving of the motor 1100 based on the results of processing various information using the processor 100 and memory. For example, the control device 1 may control the driving of the motor 1100 for the compressor 1000 used in the refrigerator 2000. The motor 1100 used in the refrigerator 2000 may include a plurality of coils. The control device 1 can control the current flowing through a plurality of coils included in the motor 1100.

In one embodiment, the inverter unit 140 may convert direct current voltage into alternating current voltage and supply it to the motor 1100. The inverter unit 140 may include a plurality of

switches

141, 142, 143, and 144. For example, the inverter unit 140 may include a first switch 141, a second switch 142, a third switch 143, and an N (N is a natural number of 4 or more) switch 144. . The plurality of

switches

141, 142, 143, and 144 may switch the coil through which current flows among the plurality of coils included in the motor.

In one embodiment, the processor 100 may control the inverter unit 140 with a square wave.

In one embodiment, processor 100 may determine a torque correction amount. The torque correction amount can be used to smooth the speed of the motor 1100. The speed of the motor 1100 can be maintained at a constant value according to the torque correction amount determined by the processor 100.

In one embodiment, the processor 100 may set the electrical conduction angle of the plurality of

switches

141, 142, 143, and 144. The processor 100 is greater than the first energization angle of the plurality of

switches

141, 142, 143, and 144 in the first mechanical angle range constituting one mechanical angle cycle of the rotor of the motor, excluding the first mechanical angle range. The second energization angle of the plurality of

switches

141, 142, 143, and 144 may be set to a larger value in the second mechanical angle range.

FIG. 2 is a diagram showing an example of the schematic configuration of the control device 1 according to the first embodiment.

The control device 1 is, for example, a device that controls the driving of the motor 1100 for the compressor 1000 used in the refrigerator 2000 described in connection with FIGS. 1A and 1B. However, the present invention is not limited to this, and the control device 1 may be a device that controls the operation of a motor used in other home appliances such as air conditioners (eg, air conditioners) and washing machines. The control device 1 includes an AC power source 110, a rectifier circuit 120, a smoothing condenser 130, an inverter unit 140, and a processor 100, and converts the inverter unit 140 into a square wave It is a control device that controls the operation of the motor 1100 by controlling it.

The compressor 1000 is a device that performs a suction stroke to fill the refrigerant in the cylinder, a compression stroke to compress the refrigerant in the cylinder, and a discharge stroke to discharge the compressed refrigerant to the outside of the compressor 1000. The compression mechanism of the compressor 1000 is not particularly limited, and examples include a rotary type, a reciprocating type, and a scroll type.

The motor 1100 may be an example of a 6-pole, 3-phase permanent magnet synchronous motor (PMSM). However, the type of motor 1100 is not particularly limited.

The rectifier circuit 120 is connected to the AC power source 110 and converts the alternating current voltage from the AC power source 110 into direct current voltage.

The smoothing capacitor 130 is connected to the direct current output terminal of the rectifier circuit 120 and smoothes the direct current voltage output from the rectifier circuit 120.

The inverter unit 140 is a circuit for converting direct current voltage into alternating current voltage and supplying it to the motor 1100. The inverter unit 140 is configured by a bridge circuit and includes six independent transistors 141 to 146 as multiple sets of switching elements. In this embodiment, the inverter unit 140 has a pair of transistors for each phase of the motor 1100 (three phases: U phase, V phase, and W phase). Specifically, it has a U-use transistor 141 and a transistor 142, a V-use transistor 143 and a transistor 144, and a W-use transistor 145 and a transistor 146. The emitters of

transistors

141, 143, and 145 and the collectors of

transistors

142, 144, and 146 are connected to the coils of each phase of the motor 1100, respectively. Additionally, the collectors of

transistors

141, 143, and 145 are connected to the anode side line of the power supply, and the emitters of

transistors

142, 144, and (146) are connected to the cathode side (ground) line of the power supply. It is done. The transistors 141 to 146 may be power transistors of various structures such as bipolar type, field effect type, and MOS type.

Each of the transistors 141 to 146 operates ON/OFF according to a control signal output from the processor 100. Accordingly, the inverter unit 140 converts the direct current voltage into alternating current voltage and supplies it to the motor 1100 to output driving force. In other words, the motor 1100 outputs driving force by supplying current according to the ON/OFF operation of the transistors 141 to 146.

The processor 100 includes a deviation unit 10 that calculates a deviation (Δω) between the speed command value (ωr) and the actual speed (ωa) of the motor 1100, and a voltage command value (Vr) according to the deviation (Δω). It is provided with a proportional integral calculation unit 20 that performs. In addition, the processor 100 includes a correction unit 30 that determines a torque correction amount (Vc) used to smooth the speed ωa or a current (Ia) described later, and a voltage command value calculated by the proportional integral calculation unit 20 ( Vr) and the correction unit 30 are provided with an addition unit 40 that adds the determined torque correction amount (Vc). In addition, the processor 100 includes a generator that generates a phase voltage reference signal using the final command value (Vt), which is the final command value output by the addition unit 40, and the speed (ωa) of the motor 1100. (50) is provided. Additionally, the control device 1 includes a speed detection unit 60 that detects the speed ωa of the motor 1100 and a current detection unit 70 that detects the current Ia supplied to the motor 1100.

The deviation unit 10 is a speed detection unit ( The deviation (Δω) is calculated by subtracting the actual speed (ωa) of the motor 1100 detected in step 60 (Δω=ωr-ωa).

The proportional integral calculation unit 20 calculates the voltage command value Vr so that the deviation Δω becomes 0. For example, the voltage command value (Vr) may be duty (%).

In this way, the processor 100 is configured with a speed feedback control system so that the speed command value ωr matches the speed ωa of the motor 1100. In the case of square wave control, as described later, a delay occurs for control every 60 degrees, so a speed feedback control system is configured and the torque correction amount (Vc) is configured as a feed forward control system.

FIG. 3 is a diagram illustrating an example of the relationship between the state of the motor 1100 and the torque correction amount (Vc).

The correction unit 30 reads the torque correction amount (Vc) according to the state of the motor 1100 previously stored in a storage area such as ROM and outputs it to the addition unit 40. The state may be a state determined according to the number of poles and constant of the motor 1100. For example, when the motor 1100 has 6 poles and 3 phases, the states of the motor 1100 are divided into 18 states 0 to 17. The storage area stores the torque correction amount (Vc) corresponding to the state of the motor 1100 for each rotational speed of the motor 1100. FIG. 2 illustrates the torque correction amount (Vc) corresponding to the state of the motor 1100 stored in the memory area when the rotation speed of the motor 1100 is 1300 (rpm). For example, the torque correction amount (Vc) may be duty (%). In addition, the correction unit 30 is not limited to setting the torque correction amount (Vc) using the relationship between the state previously stored in the storage area and the torque correction amount (Vc). For example, the correction unit 30 may set the torque correction amount Vc calculated by substituting predetermined parameters into a calculation formula previously stored in the storage area.

The addition unit 40 calculates the value obtained by adding the voltage command value (Vr) calculated by the proportional integral operation unit 20 and the torque correction amount (Vc) determined by the correction unit 30 as the final command value (Vt), which is the final command value. It is output to the generator 50 as (Vt=Vr+Vc). For example, in state 6, the torque correction amount (Vc) is -4 (%), so when the voltage command value (Vr) is 40 (%), the adder 40 adds 36 (%) to the generator ( 50).

Next, the speed detection unit 60 will be described.

FIG. 4A is a graph showing an example of the relationship between the waveform of the induced voltage from the coil of each phase of the motor 1100 and the reference voltage. FIG. 4B is a graph showing an example of a waveform showing the result of comparing the induced voltage and the reference voltage.

When the induced voltage (EU, EV, EW) from each phase coil is greater than the reference voltage, it is called 'HIGH', and when the induced voltage is less than the reference voltage, it is called 'LOW'. The waveform of the induced voltage crosses zero. Pulsed position signals (HU, HV, HW) with rising or falling edges can be obtained. Since the combination of 'HIGH' and 'LOW' pulses for each coil is synchronized with the position of the rotor of the motor 1100, the position of the rotor can be detected by detecting the combination of pulses for each coil. The speed detection unit 60 detects the speed ωa (rpm) of the motor 1100 by detecting changes in the position of the rotor every unit time.

The current detection unit 70 detects a shunt resistor (not shown) connected to the emitter terminal side of the

transistors

142, 144, and 146 of the inverter unit 140, and a peak current flowing through the shunt resistor (hereinafter, It has a current detection circuit (not shown) that detects the 'current (Ia'). The current detection circuit is composed of an amplifier circuit and a peak hold circuit that detects the peak current flowing through the shunt resistor. This can be exemplified.

Next, the generator 50 will be described.

As shown in FIG. 2, the generator 50 generates a signal for driving the motor 1100 and a conduction angle setting unit 51 for setting the conduction angle, which is the electric angle for passing electricity to the transistors 141 to 146. It has a signal output unit 52 that outputs.

The conduction angle setting unit 51 varies the conduction angle in the first mechanical angle range constituting one mechanical angle cycle of the rotor of the motor 1100 and the second mechanical angle range excluding the first mechanical angle range. At the same time, the second conduction angle in the second mechanical angle range is set to be larger than the first conduction angle in the first mechanical angle range. The conduction angle setting unit 51 according to the present embodiment sets the conduction angle to 150 electrical degrees within the mechanical angle range corresponding to states 4 to 9 of the motor 1100, and sets the conduction angle to 150 electrical degrees in states 0 to 3 and 10 to 17. Set the conduction angle to 120 electrical degrees within the corresponding mechanical angle range. That is, the first mechanical angle range is the mechanical angle range corresponding to states 0 to 3 and 10 to 17, and the second mechanical angle range is the mechanical angle range corresponding to states 4 to 9. Additionally, the first conduction angle is an electrical angle of 120 degrees, and the second conduction angle is an electrical angle of 150 degrees. Hereinafter, the mechanical angle range in which the current conduction angle is set to 150 electrical degrees may be referred to as the 'predetermined angle range'.

FIG. 4C is a graph showing an example of the ON/OFF state of the transistors 141 to 146 of the inverter unit 140 based on the signal output from the signal output unit 52.

The signal output unit 52 outputs a signal for driving the motor 1100 based on the position of the rotor and performs PWM chopping using the PWM waveform. PWM chopping refers to minutely turning on/off the signal for driving the motor 1100. By turning the signal on/off minutely, the current supplied to each phase of the motor 1100 can be controlled according to the duty, thereby controlling the output torque.

The signal output unit 52 turns on the transistors 141 to 146 at an advanced angle of 30 degrees, as shown in FIG. 4C. In other words, the signal output unit 52 sets the timing of transition of the transistors 141 to 146 from the OFF state to the ON state to 0 degrees immediately after acquisition of the rotor position signals (HU, HV, HW). For example, when the signal output unit 52 acquires the rising edge of the position signal HU, it turns on the transistor 141 above the U phase, and when the rising edge of the position signal HV is acquired, the transistor 141 turns on the upper V phase. The transistor 143 is turned ON, and when the rising edge of the position signal HW is acquired, the transistor 145 above the W phase is turned ON.

On the other hand, as shown in FIG. 4C, the signal output unit 52 outputs the

transistors

141, 143, ( 145) is turned off at an advance angle of 0 degrees, and outside the predetermined angle range,

transistors

141, 143, and (145) are turned off at an advance angle of 30 degrees. In other words, the signal output unit 52 sets the timing for transitioning the

transistors

141, 143, and 145 from the ON state to the OFF state to 30 degrees after acquisition of the position signal within a predetermined angle range, and Outside the range, it is set to 0 degrees immediately after acquisition of the position signal. For example, within a predetermined angle range, the signal output unit 52 sets the rising edge of the position signal HW to 30 degrees after acquisition and turns off the transistor 143 above the V phase, and outside the predetermined angle range, , when the rising edge of the position signal HW is acquired, the transistor 143 above the V phase is turned OFF. Additionally, within a predetermined angle range, the signal output unit 52 sets the rising edge of the position signal HU to 30 degrees after acquisition and turns off the transistor 145 above the W phase, and outside the predetermined angle range, the position When the rising edge of the signal (HU) is acquired, the transistor 145 above the W phase is turned OFF. Additionally, within a predetermined angle range, the signal output unit 52 sets the rising edge of the position signal HV to 30 degrees after acquisition and turns off the transistor 141 above the U phase, and outside the predetermined angle range, the position When the rising edge of the signal HV is acquired, the transistor 141 above the U phase is turned OFF. Accordingly, within a predetermined angle range, the conduction angles of the

transistors

141, 143, and 145 overlap by 0 degrees of the advance angle of the timing of transition from the ON state to the OFF state, causing an electrical angle of 30 degrees to overlap.

In addition, in the example shown in FIG. 4C, the signal output unit 52 performs PWM chopping only of the transistors above each phase, but may perform PWM chopping only of the transistors below each phase, or may perform PWM chopping of both the upper and lower sides. .

As explained above, the control device 1 sets a voltage command value Vr (an example of a control value) determined so that the speed ωa of the motor 1100 detected by the speed detection unit 60 is equal to the speed command value ωr. , and a correction unit 30 that performs correction using a torque correction amount (Vc) that suppresses fluctuations in the current supplied to the motor 1100. In addition, the control device 1 is provided with an inverter unit 140 having transistors 141 to 146 as an example of a plurality of switches for switching coils through which current flows within the plurality of coils of the motor 1100. , It is a control device that controls the driving of the motor 1100 by controlling the inverter unit 140 with a square wave. Then, the control device 1 controls the first mechanical angle range (for example, the mechanical angle range corresponding to states 0 to 3 and 10 to 17) constituting one mechanical angle cycle of the rotor of the motor 1100 and the corresponding In the second mechanical angle range excluding the first mechanical angle range (e.g., the mechanical angle range corresponding to states 4 to 9), the conduction angle, which is the electrical angle for passing electricity to the transistors 141 to 146, can be varied. It is provided with a full width setting unit (51). Additionally, the conduction angle setting unit 51 may set the second conduction angle in the second mechanical angle range to be larger than the first conduction angle in the first mechanical angle range. For example, the conduction angle setting unit 51 may set the second conduction angle to, for example, an electrical angle of 150 degrees, and set the first conduction angle to, for example, an electrical angle of 120 degrees.

510, 520, and 530 in FIG. 5 are graphs showing an example of the operation of the

correction unit

30, and 540, 550, and 560 in FIG. 5 are graphs showing an example of the operation of the comparative example. 510, 520, and 530 in FIG. 5 show the final command value (Vt) (duty (%)) output by the addition unit 40, and the speed (ωa) (rpm) of the motor 1100 detected by the speed detection unit 60. , shows the current (Ia) of the motor 1100 detected by the current detection unit 70. In addition, 540, 550, and 560 in FIG. 5 are not provided with the correction unit 30 as a comparative example, and the final command value (Vt) when the voltage command value (Vr) is not corrected (same as the voltage command value (Vr) ), the speed (ωa) (rpm) of the motor 1100 detected by the speed detection unit 60, and the current (Ia) of the motor 1100 detected by the current detection unit 70. In addition, at 510, 520, 530, 540, 550, and 560 in FIG. 5, the conduction angle setting unit 51 sets the conduction angle to the same electrical angle of 120 degrees in all mechanical angle ranges of the rotor of the motor 1100. It shows an example.

As shown at 510, 520, 530, 540, 550, and 560 of FIG. 5, the adder 40 corrects the voltage command value (Vr) using the torque correction amount (Vc) output by the correction unit 30. By outputting the final command value Vt (Vt=Vr+Vc), a decrease in the speed ωa of the motor 1100 is suppressed, and thus vibration of the motor 1100 is suppressed. In addition, since the maximum current of the motor 1100 is suppressed, the current rating of the power module can be reduced, making it possible to miniaturize the inverter unit 140.

Additionally, in the control device 1, the conduction angle setting unit 51 sets the second conduction angle in the second mechanical angle range to be larger than the first conduction angle in the first mechanical angle range, that is, one By overlapping the electrical angle that passes through a commercial usage transistor (e.g., transistor 141) and the electrical angle that passes through another commercial transistor (e.g., transistor 143), the d-axis current decreases and the motor 1100 The maximum value of current is suppressed. As a result, the current rating of the power module can be reduced, making it possible to miniaturize the inverter unit 140.

However, the energization angle setting unit 51 sets the first mechanical angle range of the rotor of the motor 1100 (for example, the mechanical angle range corresponding to states 0 to 3 and 10 to 17) and the second mechanical angle range ( For example, the conduction angle can be varied within the mechanical angle range corresponding to states 4 to 9. In other words, the conduction angle setting unit 51 overlaps the conduction angle only within the second mechanical angle range (for example, the mechanical angle range corresponding to states 4 to 9).

Figure 6 shows a case where the conduction angle is set to 150 electrical degrees only in the second mechanical angle range (for example, the mechanical angle range corresponding to states 4 to 9), and in the first mechanical angle range, the conduction angle is set to 120 electrical degrees. This is a graph showing an example of the change in final command value (Vt). As a comparative example, Figure 6 contains a graph showing an example of the change in the final command value (Vt) when the energization angle is set to 120 electrical degrees and when the electrical angle is set to 150 degrees in all mechanical angle ranges of the rotor.

As shown in FIG. 6, the conduction angle setting unit 51 sets the conduction angle to 150 electrical degrees only in the second mechanical angle range, and sets the conduction angle to 120 electrical degrees in the first mechanical angle range, so that all of the rotor In the mechanical angle range, the final command value (Vt) (duty) can be made smaller than when the conduction angle is set to 120 electrical degrees. As a result, it can cope with higher loads.

Also, as shown in FIG. 6, the conduction angle setting unit 51 sets the conduction angle to 150 electrical degrees in the second mechanical angle range, and sets the conduction angle to 120 electrical degrees in the first mechanical angle range, thereby adjusting the conduction angle of the rotor. In all mechanical angle ranges, the minimum value of the final command value (Vt) (duty) can be increased compared to the case where the conduction angle is set to 150 electrical degrees. Here, the waveform of the induced voltage occurs only when the transistor is in the ON state (for example, the transistor 141 and the transistor 145 are in the ON state), so the transistor must be in the ON state for a certain period of time or more to detect the position of the rotor. There is. Since the conduction angle setting unit 51 can increase the minimum value of the final command value (Vt) by setting the conduction angle to 150 electrical degrees within the second mechanical angle range, the motor 1100 by the speed detection unit 60 The stability of rotor position detection can be improved. As a result, high-speed bursting can be realized by preventing the flow from deviating.

Figure 7 is a flowchart showing a control method of the control device 1 according to an embodiment.

In operation 710, the coil through which current flows among the plurality of coils included in the motor 1100 may be switched using the inverter unit 140 of the control device 1 according to an embodiment.

In operation 720, the inverter unit 140 may be controlled with a square wave using the processor 100 of the control device 1 according to an embodiment.

In operation 730, the torque correction amount used to smooth the speed of the motor 1100 may be determined using the correction unit 30 included in the processor 100 according to an embodiment.

In operation 740, using the energization angle setting unit 51 included in the processor 100 according to an embodiment, a plurality of switches are set in a first mechanical angle range constituting one mechanical angle cycle of the rotor of the motor 1100. A plurality of switches (141, 142, 143, 144, 145, 146) in a second mechanical angle range excluding the first mechanical angle range than the first energization angle of the (141, 142, 143, 144, 145, 146) ) can be set to a larger value.

FIG. 8 is a diagram showing an example of the control device 2 according to the second embodiment.

The control device 2 according to the second embodiment is different from the control device 1 according to the first embodiment in that the generator 250 corresponding to the generator 50 is different. Hereinafter, differences from the first embodiment will be explained. In the first and second embodiments, the same symbols are used for the same items, and detailed description thereof will be omitted.

The generator 250 according to the second embodiment is different from the generator 50 according to the first embodiment in that the conduction angle setting section 251 corresponds to the conduction angle setting section 51. The conduction angle setting unit 51 according to the first embodiment sets the predetermined angle range for setting the conduction angle to 150 electrical degrees as a predetermined mechanical angle range, but the conduction angle setting unit 251 according to the second embodiment sets the predetermined angle range for setting the conduction angle to 150 electrical degrees. , a predetermined angle range is determined according to the speed (ωa) of the motor 1100.

More specifically, the energization angle setting unit 251 sets the predetermined angle range as a section in which the speed ωa decreases by a predetermined ratio or more with respect to the speed command value ωr. For example, when the speed command value (ωr) is 1300 (rpm) and the predetermined ratio is 10%, the predetermined angle range is set to the speed (ωa) that is less than or equal to 1300Х (1-10/100) = 1170 (rpm). Set it as a range. If Figure 4(a) is the speed ωa (rpm) when the speed command value ωr is 1300 (rpm), the energization angle setting unit 251 sets a predetermined angle range corresponding to states 5 to 7. Set it as the mechanical angle range. In the above case, the conduction angle setting unit 251 sets the conduction angle to 150 electrical degrees in states 5 to 7, and sets the conduction angle to 120 electrical degrees in states 0 to 4 and 8 to 17.

In addition, the predetermined ratio is not limited to 10%. For example, the predetermined ratio may be 15% or other values.

In addition, when determining the section in which the speed ωa decreases by a predetermined ratio or more with respect to the speed command value ωr, the energization angle setting unit 251 may use the speed ωa before one revolution immediately before, or the speed ωa before the previous 5 revolutions. The average value of the speed (ωa) per rotation may be used.

In addition, when the speed ωa in one state decreases by more than a predetermined ratio with respect to the speed command value ωr, the conduction angle setting unit 251 sets the conduction angle of the next state of one state to an electric angle of 150. You can also set it as a road.

As described above, the conduction angle setting unit 251 determines the first mechanical angle range and the second mechanical angle range according to the speed ωa, which is the rotation speed of the motor 1100. For example, the conduction angle setting unit 251 adjusts the conduction angle differently when the speed ωa is below a predetermined speed, for example, when the speed ωa decreases by a predetermined ratio or more with respect to the speed command value ωr. do. In other words, the conduction angle setting unit 251 sets the section in which the conduction angle is different depending on the load of the motor 1100. As a result, for example, when the load on the motor 1100 is low and the speed change is small, the section in which the conduction angle is set to, for example, 150 electrical degrees is reduced, so that the power is deteriorated due to the conduction angle being set to 150 electrical degrees. It can be suppressed.

Fig. 9 is a diagram showing an example of the control device 3 according to the third embodiment.

The control device 3 according to the third embodiment is different from the control device 1 according to the first embodiment in that the generator 350 corresponding to the generator 50 is different. Hereinafter, differences from the first embodiment will be explained. In the first and third embodiments, the same symbols are used for the same items, and detailed description thereof will be omitted.

The generation unit 350 according to the third embodiment has an adjustment unit 353 for adjusting the overlapping electric angle with respect to the generation unit 50 according to the first embodiment, and corresponds to the electric conduction angle setting unit 51. The difference is that the conduction angle setting unit 351 sets the conduction angle so as to overlap the electric angle adjusted by the adjustment unit 353. The conduction angle setting unit 51 according to the first embodiment overlaps the electrical angle by 30 degrees in a predetermined mechanical angle range, but the conduction angle setting unit 351 according to the third embodiment adjusts the electrical angle by 30 degrees. Overlap by the angle.

The adjustment unit 353 adjusts the electrical angle of overlap according to the load of the motor 1100. For example, depending on the load of the motor 1100, the adjustment unit 353 sets the overlapping electrical angle to, for example, 30 degrees when the load is large, and sets the overlapping electrical angle to, for example, 15 degrees when the load is small. This can be exemplified.

In addition, the adjustment unit 353 may determine the load of the motor 1100 using the amount of change in speed ωa at the immediately previous mechanical angle of 360 degrees. For example, if the amount of change in speed ωa at the previous machine angle of 360 degrees is greater than or equal to the first speed change amount (e.g., 500 (rpm)), it is determined that the load is large, and the first speed change amount (e.g., 500 (rpm)) is determined to be large. (rpm)), for example, it may be determined that the load is small.

Additionally, the adjusting unit 353 may adjust the electrical angle of overlap in multiple stages according to the load of the motor 1100. For example, when the load of the motor 1100 is large, the overlapping electrical angle is set to 30 degrees, for example, and when the load is small, the electrical angles are not overlapped. When the load is in the middle between large and small, the electrical angle is set to 30 degrees. The electrical angle of overlap may be, for example, 15 degrees.

For example, the adjustment unit 353 determines that the load is large when the amount of change in speed ωa at the immediately preceding machine angle of 360 degrees is greater than or equal to the first amount of speed change (e.g., 500 (rpm)), and generates overlapping electric power. The angle is set to, for example, 30 degrees, and if the second speed change amount (e.g., 100 (rpm)) is smaller than the first speed change amount, it is determined that the load is small and no overlap is made. And, when the amount of change in speed ωa is between the second speed change amount (e.g., 100 (rpm)) and less than the first speed change amount (e.g., 500 (rpm)), the adjustment unit 353 generates overlapping electric power. For example, the angle can be set to 15 degrees.

Then, the conduction angle setting unit 351 sets the conduction angle so as to overlap the electric angle adjusted by the adjustment unit 353. In other words, the conduction angle setting unit 351 causes the second conduction angle, which is the conduction angle in the second mechanical angle range, to be larger than the first conduction angle, which is the conduction angle in the first mechanical angle range, and causes the motor 1100 to Adjust the second conduction angle according to the load. For example, when the load on the motor 1100 is moderate, the conduction angle setting unit 351 sets the second conduction angle to an electrical angle of 135 degrees.

When the second conduction angle is set to 135 electrical degrees so that the overlapping electrical angle is, for example, 15 degrees, the signal output unit 52 changes the

transistors

141, 143, and 145 from the ON state to the OFF state. The timing of transition to is set to 15 degrees after acquisition of the position signal within a predetermined angle range.

According to the generator 350 according to the third embodiment configured as described above, the switching loss of the inverter unit 140 can be suppressed, and thus the increase in energy due to overlapping electric angles can be suppressed. .

In addition, the conduction angle setting unit 351 according to the third embodiment may also determine a predetermined angle range according to the speed ωa of the motor 1100, similar to the conduction angle setting unit 251 according to the second embodiment.

Fig. 10 is a diagram showing an example of the control device 4 according to the fourth embodiment.

The control device 4 according to the fourth embodiment is different from the control device 1 according to the first embodiment in that the correction unit 430 corresponding to the correction unit 30 is different. Hereinafter, differences from the first embodiment will be explained. In the first and fourth embodiments, the same symbols are used for the same items, and detailed description thereof will be omitted.

The correction unit 430 adjusts the torque correction amount (Vc) according to the amount of change in the speed (ωa) of the motor 1100. For example, when the amount of change in speed ωa at the immediately preceding machine angle of 360 degrees is greater than or equal to the first speed change amount (for example, 500 (rpm)), the correction unit 430 adjusts the torque correction amount illustrated in FIG. 2 ( Vc), and if it is less than the first speed change amount (for example, 500 (rpm)), the torque correction amount (Vc) may be set to 0 in all states.

Additionally, the correction unit 430 may determine the torque correction amount (Vc) in multiple stages according to the amount of variation in the speed (ωa) of the motor 1100. For example, when the amount of change in speed ωa at the immediately preceding machine angle of 360 degrees is greater than or equal to the first speed change amount (for example, 500 (rpm)), the correction unit 430 adjusts the torque correction amount illustrated in FIG. 2 ( Vc), and if the second speed change amount is less than the first speed change amount (for example, 100 (rpm)), the torque correction amount (Vc) is set to 0 in all states. In addition, when the amount of change in speed ωa is intermediate, which is greater than or equal to the second speed change amount (e.g., 100 (rpm)) and less than the first speed change amount (e.g., 500 (rpm)), the correction unit 430 adjusts the torque The correction amount (Vc) is reduced from the torque correction amount (Vc) illustrated in FIG. 2. In other words, the correction unit 430 makes the torque correction amount Vc smaller than the absolute value of the torque correction amount Vc illustrated in FIG. 2. For example, the correction unit 430 may set the torque correction amount (Vc) when the amount of variation in the speed (ωa) is moderate to 1/2 of the torque correction amount (Vc) illustrated in FIG. 2.

According to the correction unit 430 according to the fourth embodiment configured as above, when the amount of variation in the speed ωa of the motor 1100 is small, in other words, when the load is small, the correction unit 430 provides the torque correction amount ( Due to determining Vc), an increase in the maximum current of the motor 1100 can be suppressed.

Additionally, the correction unit 430 according to the fourth embodiment may be applied to the control device 2 according to the second embodiment and the control device 3 according to the third embodiment.

Fig. 11 is a diagram showing an example of the control device 5 according to the fifth embodiment.

The control device 5 according to the fifth embodiment differs from the control device 1 according to the first embodiment in that the correction unit 530 corresponding to the correction unit 30 is different. Hereinafter, differences from the first embodiment will be explained. In the first and fifth embodiments, the same symbols are used for the same items, and detailed description thereof will be omitted.

When the final command value (Vt) is smaller than the predetermined lower limit, the torque correction amount (Vc) is biased towards positive, so the speed (ωa) of the motor 1100 exceeds the speed command value (ωr), which is the target speed, resulting in a negative effect. Therefore, when the final command value (Vt) is smaller than the predetermined lower limit, the correction unit 530 changes the torque correction amount (Vc) to the torque correction amount (Vc) in the first embodiment (for example, the torque correction amount illustrated in FIG. 2). (Vc)). For example, the correction unit 530 divides the torque correction amount Vc by adding a predetermined coefficient to the torque correction amount Vc in the first embodiment (for example, the torque correction amount Vc illustrated in FIG. 2). Multiply the value. For example, the lower limit is 17 (%). Additionally, the predetermined coefficient may be 0.5.

For example, the correction unit 530 changes the torque correction amount (Vc) of one revolution from the next state in which the final command value (Vt) becomes smaller than the lower limit to the torque correction amount (Vc) in the first embodiment (e.g., FIG. 2 For example, it may be made smaller than the torque correction amount (Vc) shown in .

As a result, the speed ωa of the motor 1100 can be suppressed from exceeding the speed command value ωr, which is the target speed.

Alternatively, when the final command value (Vt) is less than the lower limit and the speed (ωa) of the motor 1100 is greater than a predetermined speed, the correction unit 530 adjusts the torque correction amount (Vc) as in the first embodiment. It may be a value obtained by multiplying the torque correction amount Vc (for example, the torque correction amount Vc illustrated in FIG. 2) by a predetermined coefficient. The predetermined speed may be, for example, a speed command value (ωr). For example, when determining whether the average speed of the speed ωa is greater than a predetermined speed, the correction unit 530 may use the speed ωa at the previous mechanical angle of 360 degrees.

As a result, the speed ωa of the motor 1100 can be suppressed from exceeding the speed command value ωr, which is the target speed. In addition, since the minimum value of the final command value (Vt) can be increased, the stability of detection of the position of the rotor of the motor 1100 by the speed detection unit 60 can be improved. As a result, high-speed bursting can be realized by preventing the flow from deviating.

Additionally, the correction unit 530 according to the fifth embodiment may be applied to the control device 2 according to the second embodiment and the control device 3 according to the third embodiment.

A refrigerator 2000 including a control device 1 for controlling the operation of the motor 1100 according to an embodiment includes a storage compartment 2200, a door 2300 configured to open and close one open side of the storage compartment 2200, A cold air supply device 2400 that generates cold air through a refrigeration cycle including compression, condensation, expansion, and evaporation processes of the refrigerant and supplies cold air to the storage compartment 2200, and a compressor 1000 included in the cold air supply device 2400. ) may include a motor 1100 used to drive the motor 1100, and a control device 1 that controls the driving of the motor 1100. The control device (1, 2, 3, 4, 5) according to one embodiment includes a plurality of switches (141, 142, 143, It may include an inverter unit 140 including 144, 145, and 146) and a processor 100 that controls the inverter unit 140 with a square wave. The processor 100 according to an embodiment determines the torque correction amount used to smooth the speed of the motor 1100, and determines a plurality of torque correction amounts in the first mechanical angle range constituting one mechanical angle cycle of the rotor of the motor 1100. A plurality of switches (141, 142, 143, 144, 145, 146), the second conduction angle is set, and the second conduction angle can be set to a value greater than the first conduction angle.

In one embodiment, the processor 100 may determine the first mechanical angle range and the second mechanical angle range according to the detected speed of the motor 1100.

In one embodiment, the processor 100 may adjust the second energization angle according to the load of the motor 1100.

In one embodiment, the processor 100 may adjust the torque correction amount according to the amount of change in the speed of the motor 1100.

In one embodiment, the processor 100 may reduce the torque correction amount when the amount of change in the speed of the motor 1100 is less than a predetermined speed change amount value than when the amount of change is greater than or equal to the preset speed change amount value.

In one embodiment, the processor 100 may include an adder 40 that outputs a final command value using a determined voltage command value and a torque correction amount so that the speed of the motor 1100 is equal to the speed command value. The processor 100 according to one embodiment may reduce the torque correction amount when the final command value output by the adder 40 is less than a predetermined lower limit.

In one embodiment, the processor 100 operates the plurality of

switches

141, 142, 143, 144, 145, and 146 when at least one of the first and second conduction angles is within a predetermined angle range. The first conduction angle and the second conduction angle can be overlapped based on the advance of the timing of transitioning at least one switch from the ON state to the OFF state.

In one embodiment, the processor 100 may include an adjuster 353 that adjusts the electrical angle at which the first and second conduction angles overlap according to the load of the motor 1100. Through the processor 100 according to one embodiment, the electric angle can be overlapped by the angle adjusted by the adjustment unit 353.

A storage compartment 2200 according to an embodiment, a cold air supply device 2400 that generates cold air through a refrigeration cycle including compression, condensation, expansion, and evaporation of a refrigerant, and supplies cold air to the storage compartment 2200. The control method of the refrigerator 2000 including a motor 1100 used to drive the compressor 1000 included in the device 2400, and a control device 1 for controlling the operation of the motor 1100, includes the control method, An operation of switching a current-carrying coil among a plurality of coils included in the motor 1100 through the inverter unit 140 of the

devices

1, 2, 3, 4, and 5, and the

control devices

1, 2, and 3 , 4, 5), an operation of controlling the inverter unit 140 with a square wave, an operation of determining a torque correction amount used to smooth the speed of the motor 1100 through the processor 100, and through the processor 100, a first switch of the plurality of

switches

141, 142, 143, 144, 145, and 146 in a first mechanical angle range constituting one mechanical angle cycle of the rotor of the motor 1100. It may include an operation of setting the second energization angle of the plurality of

switches

141, 142, 143, 144, 145, and 146 to a larger value in the second mechanical angle range excluding the first mechanical angle range than the full angle. .

In one embodiment, the operation of determining the first mechanical angle range and the second mechanical angle range according to the detected speed of the motor 1100 through the processor 100 may be included.

In one embodiment, the operation of adjusting the second energization angle according to the load of the motor 1100 through the processor 100 may be included.

In one embodiment, the operation of adjusting the torque correction amount according to the amount of change in the speed of the motor 1100 through the processor 100 may be included.

In one embodiment, when the amount of change in speed of the motor 1100 is less than a predetermined speed change amount value, the processor 100 may include an operation of reducing the torque correction amount compared to when the amount of change is more than a predetermined speed change amount value. there is.

In one embodiment, an operation of outputting a final command value through the processor 100 using a determined voltage command value and a torque correction amount so that the speed of the motor 1100 is equal to the speed command value, and through the processor 100, an adder If the final command value output by (40) is less than a predetermined lower limit, an operation of reducing the torque correction amount may be included.

In one embodiment, through the processor 100, when at least one of the first and second conduction angles is within a predetermined angle range, the plurality of

switches

141, 142, 143, 144, 145, and 146 ) may include an operation of overlapping the first conduction angle and the second conduction angle based on the advance of the timing of transitioning at least one switch from the ON state to the OFF state.

According to the present disclosure, robust performance can be improved while reducing energy consumption, thereby achieving high robustness and improving the performance of suppressing vibration.

Claims

storeroom;

a door configured to open and close one open side of the storage compartment;

a cold air supply device that generates cold air through a refrigeration cycle including compression, condensation, expansion, and evaporation of a refrigerant, and supplies the cold air to the storage compartment;

A motor used to drive a compressor included in the cold air supply device; and

Including a control device that controls driving of the motor,

The control device is,

an inverter unit including a plurality of switches that switch a current-carrying coil among the plurality of coils included in the motor; and

It includes a processor that controls the inverter unit with a square wave,

The processor,

determine a torque correction amount used to smooth the speed of the motor;

A first energization angle of the plurality of switches in a first mechanical angle range constituting one mechanical angle cycle of the rotor of the motor, and a second energization angle of the plurality of switches in a second mechanical angle range excluding the first mechanical angle range. Set the conduction angle,

A refrigerator that sets the second conduction angle to a value greater than the first conduction angle.
In claim 1,

The processor determines the first mechanical angle range and the second mechanical angle range according to the detected speed of the motor.
In claim 1 or 2,

The processor adjusts the second energization angle according to the load of the motor.
The method of any one of claims 1 to 3,

The processor adjusts the torque correction amount according to the amount of change in the speed of the motor.
In claim 4,

The processor, when the amount of change in the speed of the motor is less than a predetermined speed change amount value, reduces the torque correction amount compared to when the amount of change is greater than or equal to the preset speed change amount value.
The method of any one of claims 1 to 5,

The processor,

It further includes an addition unit that outputs a final command value using a voltage command value and the torque correction amount determined so that the speed of the motor is equal to the speed command value,

The processor,

A refrigerator that reduces the torque correction amount when the final command value output by the adder is smaller than a predetermined lower limit.
The method of any one of claims 1 to 6,

The processor, when at least one of the first conduction angle and the second conduction angle is within a predetermined angle range, advances the timing of transitioning at least one switch from the plurality of switches from the ON state to the OFF state. Based on, a refrigerator that overlaps the first conduction angle and the second conduction angle.
In claim 7,

The processor,

It further includes an adjustment unit that adjusts an electrical angle at which the first conduction angle and the second conduction angle overlap according to the load of the motor,

The processor is a refrigerator that overlaps the electric angle by the angle adjusted by the adjustment unit.
storeroom;

a cold air supply device that generates cold air through a refrigeration cycle including compression, condensation, expansion, and evaporation of a refrigerant, and supplies the cold air to the storage compartment;

A motor used to drive a compressor included in the cold air supply device; and

In a refrigerator control method including a control device for controlling driving of the motor,

An operation of switching a current-carrying coil among a plurality of coils included in the motor through an inverter unit of the control device;

An operation of controlling the inverter unit with a square wave through a processor of the control device;

determining, via the processor, a torque correction amount used to smooth the speed of the motor; and

Through the processor, the first energization angle of the plurality of switches in the first mechanical angle range constituting one mechanical angle cycle of the rotor of the motor is greater than the first energization angle of the plurality of switches in the second mechanical angle range excluding the first mechanical angle range. A refrigerator control method comprising setting the second energization angle of the switches to a large value.
In claim 9,

The method of controlling a refrigerator further comprising determining, through the processor, the first mechanical angle range and the second mechanical angle range according to the detected speed of the motor.
The method of claim 9 or 10,

A refrigerator control method further comprising adjusting the second energization angle according to the load of the motor through the processor.
The method of any one of claims 9 to 11,

A refrigerator control method further comprising adjusting the torque correction amount according to the amount of change in the speed of the motor through the processor.
In claim 12,

A refrigerator control method further comprising, through the processor, reducing the torque correction amount when the amount of change in the speed of the motor is less than a predetermined speed change amount value compared to when the amount of change is more than the preset speed change amount value. .
The method of any one of claims 9 to 13,

Outputting, through the processor, a final command value using a determined voltage command value and the torque correction amount so that the speed of the motor becomes equal to the speed command value; and

A refrigerator control method further comprising reducing the torque correction amount when the final command value output by the adder through the processor is less than a predetermined lower limit.
The method of any one of claims 9 to 14,

Through the processor, when at least one of the first conduction angle and the second conduction angle is within a predetermined angle range, timing for transitioning at least one switch among the plurality of switches from the ON state to the OFF state is determined. A refrigerator control method further comprising an operation of overlapping the first conduction angle and the second conduction angle based on the advance angle.