Motor control device

Abstract

A motor control device according to one embodiment of the present invention comprises: a first power source connection unit for receiving a first power source; a second power source connection unit for receiving a second power source that is smaller than the first power source; a driving unit directly connected to a motor so as to supply the first power, thereby driving the motor; a position sensor unit for detecting the position of the motor; and a control unit, which uses a sensing signal of the position sensor unit so as to generate a pulse modulation signal for the driving of the motor, thereby transmitting same to the driving unit, wherein the first power source connection unit, the driving unit, the position sensor unit, and the control unit are high voltage units for receiving the first power source, and the second power source connection unit is a low voltage unit for receiving the second power and is integrated with the motor.

Description

motor control unit

[0001] The present invention relates to a motor control device.

[0002] A hybrid electric vehicle (HEV) or plug-in hybrid vehicle (PHEV) is a vehicle that efficiently combines two or more different power sources to propel the vehicle. Most commonly, this refers to a vehicle powered by a fuel-powered engine and a battery-powered electric motor. HEVs or plug-in hybrid vehicles (PHEVs) are gaining attention as a means to address environmental pollution and improve energy efficiency.

[0003] A plug-in hybrid electric vehicle (PHEV) is a vehicle that is equipped with both a gasoline-powered internal combustion engine and a battery engine like a conventional hybrid vehicle, and can be powered by one or both of them. It is also equipped with a large-capacity, high-voltage battery that can be charged with electricity. It has the advantage of being able to be used continuously because it can be charged with electricity at home or at a charging station just like charging a cell phone or filling up with gasoline.

[0004] These hybrid or plug-in hybrid vehicles are essentially vehicles equipped with an engine, a motor, a battery, and a high-voltage battery. They propel the vehicle by driving an electric motor using electrical energy supplied by the battery. While these electric motors typically require alternating current (AC) power, the vehicle's onboard battery supplies direct current (DC) power. Therefore, a device that converts DC power to AC power is required to operate the electric motor.

[0005] The motor control unit not only converts direct current power into alternating current power, but also precisely controls the voltage and frequency of the motor using pulse width modulation (PWM) techniques to control the vehicle's speed and torque.

[0006] The technical problem to be solved by the present invention is to provide a motor control device formed integrally with a motor.

[0007] In order to solve the above technical problem, a motor control device according to an embodiment of the present invention includes a first power connection unit receiving a first power; a second power connection unit receiving a second power smaller than the first power; a driving unit directly connected to a motor and supplying the first power to drive the motor; a position sensor unit detecting a position of the motor; and a control unit generating a pulse modulation signal for driving the motor using a detection signal of the position sensor unit and transmitting the generated pulse modulation signal to the driving unit, wherein the first power connection unit, the driving unit, the position sensor unit, and the control unit are high-voltage units receiving the first power, and the second power connection unit is a low-voltage unit receiving the second power, and are formed integrally with the motor.

[0008] In addition, it may include a substrate on which the first power connection unit, the driving unit, the position sensor unit, and the control unit are arranged.

[0009] Additionally, the driving unit can be directly connected to the three phases of the motor through the substrate.

[0010] Additionally, the position sensor unit may be placed in an area of ​​the substrate adjacent to an area of ​​the substrate to which the three phases of the motor are connected.

[0011] Additionally, the position sensor unit may include a position sensor IC including a dual die 2 channel.

[0012] In addition, the control unit can compare each output signal of the dual die 2 channels to determine whether the position sensor unit is normal.

[0013] In addition, it includes an insulation unit and a conversion unit connecting the high voltage unit and the low voltage unit, and the conversion unit can insulate the high voltage unit and the low voltage unit and provide a third power source that has boosted the second power source to the high voltage unit.

[0014] Additionally, the third power source may be provided to the driving unit.

[0015] Additionally, the high voltage unit may include a first regulator connected to the converter unit to reduce the pressure of the third power source.

[0016] Additionally, the first regulator can supply power to the position sensor unit.

[0017] According to embodiments of the present invention, the motor housing is integrally assembled, and the PCB and the three phases of the motor are directly connected without the need for a conventional three-phase cable. In addition, rather than directly sensing the motor rotor to receive a motor position signal from the outside, a motor position sensor is configured within the PCB to sense the motor position, and by arranging the sensor circuit in a high-voltage area, the motor position sensing and the robustness of the motor position sensing can be secured by configuring the Rotor Position Sensor IC.

[0018] Figure 1 is a block diagram of a motor control device according to one embodiment of the present invention.

[0019] Figures 2 and 3 are block diagrams of a motor control device according to an embodiment of the present invention.

[0020] FIG. 4 and FIG. 5 are drawings for explaining a motor control device according to an embodiment of the present invention.

[0021] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the attached drawings.

[0022] However, the technical idea of ​​the present invention is not limited to some of the embodiments described, but can be implemented in various different forms, and within the scope of the technical idea of ​​the present invention, one or more of the components between the embodiments can be selectively combined or substituted for use.

[0023] In addition, terms (including technical and scientific terms) used in the embodiments of the present invention may be interpreted as having a meaning that can be generally understood by a person of ordinary skill in the technical field to which the present invention belongs, unless explicitly and specifically defined and described, and terms that are commonly used, such as terms defined in a dictionary, may be interpreted in consideration of the contextual meaning of the relevant technology.

[0024] Additionally, the terms used in the embodiments of the present invention are intended to describe the embodiments and are not intended to limit the present invention.

[0025] In this specification, the singular may also include the plural unless specifically stated otherwise in the phrase, and when it is described as “A and / or at least one (or more) of B, C”, it may include one or more of all combinations that can be combined with A, B, C.

[0026] Additionally, in describing components of embodiments of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only intended to distinguish the components from other components, and are not intended to limit the nature, order, or sequence of the components.

[0027] And, when a component is described as being 'connected', 'coupled', or 'connected' to another component, it may include not only cases where the component is 'connected', 'coupled', or 'connected' directly to the other component, but also cases where the component is 'connected', 'coupled', or 'connected' by another component between the component and the other component.

[0028] Additionally, when described as being formed or arranged "above" or "below" each component, "above" or "below" includes not only cases where the two components are in direct contact with each other, but also cases where one or more other components are formed or arranged between the two components. Furthermore, when expressed as "above" or "below," the meaning may include not only the upward direction but also the downward direction based on one component.

[0029] A variation according to the present embodiment may include some components of each embodiment and some components of other embodiments. That is, a variation may include one embodiment among various embodiments, but may omit some components and include some components of the corresponding other embodiment. Or, the opposite may be true. The features, structures, effects, etc. to be described in the embodiments are included in at least one embodiment, and are not necessarily limited to just one embodiment. Furthermore, the features, structures, effects, etc. exemplified in each embodiment can be combined or modified in other embodiments by a person having ordinary skill in the art to which the embodiments belong. Therefore, the contents related to such combinations and modifications should be interpreted as being included within the scope of the embodiments.

[0030] Figure 1 is a block diagram of a motor control device according to one embodiment of the present invention.

[0031] FIGS. 2 and 3 are block diagrams of a motor control device according to an embodiment of the present invention, and FIGS. 4 and 5 are drawings for explaining a motor control device according to an embodiment of the present invention.

[0032] A motor control device (100) according to an embodiment of the present invention is composed of a first connection unit (111), a second connection unit (112), a driving unit (113), a position sensor unit (118), and a control unit (114), and may include a first filter (112), an overcurrent detection circuit (115), a detection element (117), a first regulator (116), a second filter (122), a conversion control unit (123), a second regulator (124), a communication unit (125), a voltage monitoring unit (126), a conversion unit (131), a first insulation unit (132), and a second insulation unit (133).

[0033] A motor control device (100) according to an embodiment of the present invention may be formed on a substrate (510) mounted inside a housing of a motor (300) and may be formed integrally with the motor (300). The motor control device (100) according to an embodiment of the present invention is a device that controls a motor for an oil pump applied to a vehicle and may be mounted inside the vehicle. The motor control device may be applied to various types of vehicles (e.g., hybrid, plug-in hybrid, etc.). In addition, although the present embodiment describes the installation location of the oil pump without distinguishing between them, the present invention may be applied to both a built-in oil pump installed inside an oil pan and an external oil pump installed outside an oil pan.

[0034] The motor (300) may be a motor that drives an oil pump. For example, the motor (300) may include an LDC motor, a BLAC motor, etc. For example, the motor (300) may include a three-phase LDC motor, a three-phase BLAC motor, etc.

[0035] A low-voltage battery (400) provides power (e.g., constant power, VB) to a motor control device (100), and when the ignition key is turned on, an ignition key input power (IG) can be activated. A low-voltage battery (400) provided in a vehicle (hybrid, plug-in hybrid) supplies constant power to a motor control device (100) or control unit (114) for driving a motor (300), and when the ignition key (IGN) is turned on, the ignition key input power is supplied to a driving unit (113) that is an element for driving a motor (300).

[0036] The motor control device (100) can receive a second power supply, which is a constant power supply, through a second connection unit (121). The second power supply or power supply (VB) can be provided to the conversion unit (131) through a second filter (122) and a conversion control unit (123). The conversion unit (131) can supply a predetermined voltage to the high voltage unit (110) by the conversion control unit (123). For example, the conversion unit (131) can convert the second power supply (second voltage) into a third power supply (third voltage). The conversion unit (131) can output a third voltage of 15 V. Alternatively, the conversion unit (131) can output a third voltage of 7 V to 7.5 V. In addition, the conversion unit (131) can be connected to the first regulator (116).

[0037] The second regulator (124) may be connected to the second connection unit (121) or the second filter (122). The second regulator (124) may receive the second power and convert it to a specific voltage level (e.g., 5 V). The converted voltage may be supplied to the communication unit (125). In addition, the second regulator (124) may include a watch dog function to check whether the high-voltage MCU is operating normally. The second regulator (124) may receive a clock signal from the control unit (114) of the high-voltage unit (110) and monitor normal operation.

[0038] The voltage monitoring unit (126) can convert an analog signal into a digital signal to monitor whether the power, IGN, and 5V power generation of the low voltage unit (120) are working properly.

[0039] A motor control device (100) according to an embodiment of the present invention may include a high voltage unit (110) that receives voltage from a high voltage battery (200) and a low voltage unit (120) that receives voltage from a low voltage battery (400), for example, a low voltage of 12 V. To this end, the motor control device (100) includes a first connection unit (111) and a second connection unit (112). The first connection unit (11) may be connected to the high voltage battery (200), and the second connection unit (1112) may be connected to the low voltage battery (400). The second connection unit (112) may be connected to a TCU (500), which is a main control unit, to perform communication.

[0040] The conversion unit (131) can convert and transmit the voltage of a signal transmitted from the low voltage unit (120) to the high voltage unit (110). The conversion unit (131) is placed between the low voltage unit (120) and the high voltage unit (110), and can insulate between the low voltage unit (120) and the high voltage unit (110) and convert only the voltage level.

[0041] The first insulating portion (132) and the second insulating portion (133) are arranged between the high voltage portion (110) and the low voltage portion (120) to electrically insulate or separate the high voltage portion (110) and the low voltage portion (120). A signal transmitted and received between the high voltage portion (110) and the low voltage portion (120) can pass through one of the first insulating portion (132) and the second insulating portion (133).

[0042] A high-voltage battery (200) placed in a vehicle can supply a high voltage (HV) of, for example, 100 V or more or a first voltage to a gate driver (113a) and a bridge circuit (113b) of a driving unit (113) that drives a motor (300). The motor (300) can be driven by applying a high voltage of 100 V or more to the motor. The motor can be driven normally even in an over-discharge state of the high-voltage battery (200).

[0043] The high voltage section (110) may include a first connection section (111), a first filter (112), a driving section (113), a control section (114), an overcurrent detection circuit (115), a first regulator (116), and a position sensor section (118).

[0044] The low voltage section (120) may include a second connection section (121), a second filter (122), a conversion control section (123), a second regulator (124), a communication section (125), and a voltage monitoring section (126).

[0045] The first connection part (111) and the second connection part (121) may include connectors for connection with external devices (high voltage battery, battery) of the motor control device (100). In addition, the first connection part and the second connection part may be referred to as a 'first power connection part' and a 'second power connection part', respectively.

[0046] Specifically, in the high voltage section (110), the first connection section (111) can receive a first power source, which is a high voltage, from the high voltage battery (200).

[0047] The first filter (112) may be connected to the high voltage unit (110). The first filter (112) may include an EMC (electromagnetic compatibility) filter. The first filter (112) may reduce EMC noise contained in the high voltage first power source. The output of the first filter (112) with reduced noise and high voltage may be input to the driving unit (113).

[0048] The driving unit (113) is directly connected to the motor (300). The driving unit (113) may be connected to the motor (300) via a wire, bus bar, or pattern line formed on the substrate (510). The motor (300) may be a three-phase motor, and the driving unit (113) may include three connection lines. The driving unit (113) may drive the motor (300) by supplying power having a first voltage to the motor (300) based on the output of the first filter (112). The driving unit (113) may include a gate driver (113a), a bridge circuit (113b), and an error detection unit (113c).

[0049] The gate driver (113a) may include a circuit that receives a pulse width modulation signal from the control unit (114) and performs switching based on the applied signal (pulse width modulation signal). That is, the gate driver (113a) may include a switching circuit that outputs or switches on a pulse width modulation signal (PWM signal). In an embodiment, the gate driver (113a) may include a high-voltage direct circuit gate driver driven by a high voltage or a first voltage of a high-voltage battery (200).

[0050] The bridge circuit (113b) may be connected to the gate driver (113a). And the bridge circuit (113b) may be a driving means for driving the motor (300) according to switching from the gate driver (113a). The bridge circuit (113b) may include a three-phase full bridge circuit. In addition, the bridge circuit (113b) may be composed of an insulated gate bipolar transistor (hereinafter referred to as 'IGBT') element or a field effect transistor (hereinafter referred to as 'FET') element.

[0051] For example, N-channel IGBT elements may be used for both the high side and the low side of the driving unit (113). In vehicles such as hybrids, the motor (300) is driven using the first power source of the high-voltage battery (200), and since the bridge circuit unit (113b) is composed of IGBT elements, safety for high-voltage switching can be improved.

[0052] The error detection unit (113c) can detect non-operation, errors, etc. of the driving unit (113). The control unit (114) or the driving unit (113) can stop the switching operation of the driving unit (113) when the voltage of the bridge circuit unit (113b) is higher than a preset voltage. The error detection unit (113c) can be connected to the control unit (114) and the overcurrent detection circuit (115).

[0053] The control unit (114) can transmit a pulse modulation signal to the driving unit (113) for driving the motor (300).

[0054] The control unit (114) can receive a command from an external device within the vehicle or the TCU (500), which is the main control unit of the vehicle, through the first communication unit (125), and drive the motor (300) according to the received command. For example, the control unit (114) can receive the target RPM of the oil pump, output a pulse modulation signal (PWM signal) for driving the motor (300) according to the target RPM, and transmit the output to the drive unit (113).

[0055] The control unit (114) can be connected to a sensing element (117, Shunt R) connected to the output terminal of the driving unit (113) and receive a signal (e.g., current value) corresponding to the actual RPM. In particular, the control unit (114) can be directly connected without an insulating element between the output of the driving unit (113) and the sensing element connected thereto.

[0056] The control unit (114) can transmit a signal corresponding to the received actual RPM to the TCU (500), which is the main control unit of the vehicle, through the communication unit (125) and the first and second insulation units (132, 133).

[0057] Meanwhile, the internal control cycle (Control Interval) of the control unit (114) may be applied in a manner having a constant time interval or in a time-variant manner. In the case of adopting a time-variant manner, for example, the internal control cycle may be inversely proportional to the RPM of the motor (300). In addition, the control unit (114) may enable more precise control by performing feedback control so that the motor (300) reaches the target rotation speed using the PWM duty (Duty, %) calculated to be increased or decreased through PID control.

[0058] The position sensor unit (116) may be placed in a substrate area adjacent to the motor (300). The position sensor unit (118) may be placed in a position adjacent to the driving unit (113) that is directly connected to the motor (300). The position sensor unit (118) may detect a change in a magnetic field according to the position of a rotor provided inside the motor (300) and transmit a detection signal (Sin_A, Cos_A, Sin_B, Cos_B) to the control unit (114). The control unit (114) may set the rotation speed of the motor (300) based on the detection signal transmitted from the position sensor unit (118) that detects the position of the motor (300), diagnose whether an abnormality has occurred in the position sensor unit (118), and determine whether the motor (300) is operating normally.

[0059] Meanwhile, a TCU connection line (not shown) using a hard wire may be provided between the control unit (114) and the TCU (500) of the main control unit to enable communication even when a CAN communication failure occurs.

[0060] The overcurrent detection circuit (115) can be connected to the detection element (117) to protect the driving unit (113). The overcurrent detection circuit (115) can be connected to three detection elements (Shunt R) arranged between the control unit (114) and the motor (300). The current of the three detection elements (117) is detected, and an overcurrent signal is input to the driving unit (113) when an overcurrent or short circuit is detected in even one phase using the 3 input or gate circuit. By configuring the overcurrent detection circuit through a HW circuit configuration rather than an overcurrent calculated by the control unit (114), it is possible to prevent the protection from being delayed due to a delay speed in the calculation of the control unit (114). The 3 input or gate circuit can output an overcurrent detection signal when an overcurrent is detected in any one phase from the overcurrent detection circuit (115) or the control unit (114). For example, when an overcurrent or short is detected, an overcurrent detection signal may be provided to the error detection unit (113c). In this case, the error detection unit (113c) may stop the operation of the driving unit. The overcurrent detection circuit (115) and the control unit (114) may be connected in parallel with the detection element (117). For example, a three-phase voltage may be provided from the detection element (117) to each of the control unit (114) and the overcurrent detection circuit (115).

[0061] The overcurrent detection circuit (115) may include a plurality of comparators and gates. The plurality of comparators may be respectively connected to three-phase voltages from the sensing elements (117). For example, the three-phase voltages from the sensing elements (117) may be respectively input to the comparators. The comparators may receive reference voltages corresponding to overcurrent or open circuits. The gates may be connected to the plurality of comparators and receive output signals. Accordingly, the gates may output an overcurrent detection signal when an output corresponding to overcurrent is input from any one of the plurality of comparators. When either a fault detection signal (SW fault detection signal) of the control unit or an overcurrent detection signal (HW overcurrent detection signal) of the gate is received, a fault (e.g., an overcurrent detection signal) may be output to the error detection unit (113c). In response, the operation of the driving unit (113) may be stopped. By this configuration, damage to the driving unit (113) can be prevented for a period of time (e.g., several ms) after an overcurrent occurs due to the control unit's calculation time and signal transmission delay. In other words, the operation of the driving unit can be stopped more accurately and quickly through monitoring by the control unit (114) and the overcurrent detection circuit (115) for any one of the three phases connected to the motor (300). As a result, the reliability of the motor control device can be further improved.

[0062] The conversion control unit (123) can be connected to the conversion unit (131). When the second power source (second voltage) is converted into a third power source of 7 V to 7.5 V in the conversion unit (131) and supplied to the first regulator (116), the first regulator (116) can convert the voltage of the third power source to a predetermined voltage level (approximately 5 V). And the predetermined voltage level (approximately 5 V) can be provided to the control unit (114) and the position sensor unit (118).

[0063] In other words, the first regulator (116) can be connected to the conversion unit (131). Accordingly, the first regulator (116) can receive the third voltage output from the conversion unit (131). The voltage level of the third power source can be converted to a specific voltage level (e.g., 5 V) and output to the control unit (114) and the position sensor unit (118).

[0064] Power (e.g., three-phase, U / V / W) output from the driving unit (113) can be supplied to the motor (300). As a result, the motor for the oil pump can be driven.

[0065] Additionally, in the low voltage section (120), the second connection section (121) can receive a second power supply from the battery (400). The second power supply can have a voltage lower than the first power supply. For example, the voltage of the second power supply can be 12 V.

[0066] The second filter (122) may be connected to the second connection (121). The second filter (122) may include an EMC filter. The second filter (122) may reduce EMC noise included in the second power supply.

[0067] The power with reduced noise output from the second filter (122) can be input to the conversion control unit (123). The conversion control unit (123) may be a pulse width modulation signal controller (PWM controller). The conversion control unit (123) may be connected to the conversion unit (131) and transmit a PWM signal to the conversion unit (131).

[0068] The conversion unit (131) can convert voltage in response to a PWM signal. The conversion unit (131) can include a flyback converter. The conversion unit (131) can output dual power sources having voltages of 15 V and 7 V to 7.5 V, respectively, to the high voltage unit (110).

[0069] Power having a voltage of 7 V to 7.5 V output from the converter can be supplied to the first regulator (116). The first regulator (116) can reduce the input power (for example, reduce it to 5 V) and provide it to the control unit (114) and the position sensor unit (118). The first regulator (116) can be an LDO regulator.

[0070] The communication unit (125) can communicate with the TCU (500), which is the main control unit of the vehicle, through the second connection unit (121). The communication unit (125) can communicate with the control unit (114) through the second insulation unit (133). Through this, the first communication unit (125) can perform or mediate communication between the control unit (114) and an external control unit through the second insulation unit (133). The first communication unit (125) can be configured to perform CAN communication.

[0071] The first insulating portion (132) and the second insulating portion (133) may be positioned between the high voltage portion (110) and the low voltage portion (120). A communication signal transmitted from the low voltage portion (120) may pass through one of the first insulating portion (132) and the second insulating portion (133) and be transmitted to an element (e.g., a control portion) of the high voltage portion (110). In addition, a communication signal transmitted from the control portion (114) of the high voltage portion (110) may pass through one of the first insulating portion (132) and the second insulating portion (133) and be transmitted to the low voltage portion (120).

[0072] The first insulating portion (132) and the second insulating portion (133) can insulate the high voltage portion (110) and the low voltage portion (120). For example, the first insulating portion (132) and the second insulating portion (133) can include a digital isolator. For example, the second insulating portion (133) can be an insulating element that transmits CAN communication signals (CAN_RXD, CAN_TXD) between the high voltage portion (110) and the low voltage portion (120).

[0073] Furthermore, the control unit (114) can control the on / off of the first insulation unit (132) and the second insulation unit (133). For example, if a malfunction or failure of either of the first insulation unit (132) and the second insulation unit (133) is detected, the control unit (114) can operate the other of the first insulation unit (132) and the second insulation unit (133). Furthermore, if it is determined that both the first insulation unit (132) and the second insulation unit (133) are malfunctioning or failing, the control unit (114) can turn off both the first insulation unit (132) and the second insulation unit (133).

[0074] The first insulation unit (131) can perform SPI communication. Accordingly, when the second insulation unit (132) fails, the control unit (114) can transmit the status of the control unit (114) and the status of the second insulation unit (132) (whether it is broken, etc.) to the main control unit or an external device through the first insulation unit (131).

[0075] The second insulation unit (132) can connect the communication unit (125) and the control unit (114). The second insulation unit (132) can perform CAN communication. The second insulation unit (132) can transmit and receive signals (CAN_TXD, CAN_RXD) from the communication unit (125). Furthermore, the second insulation unit (132) can transmit and receive signals (CAN_TXD, CAN_RXD) from the control unit (114).

[0076] The conversion unit (133) can insulate between each region (low voltage section and high voltage section) between the low voltage section (120) and the high voltage section (110) and convert only the voltage level.

[0077] The conversion unit (133) can boost the second power source (second voltage) to a third power source (third voltage). In addition, the conversion unit (133) can provide the third voltage to the high voltage unit (110). In other words, the third voltage can be the power source of the high voltage unit (110). For example, the conversion unit (133) can convert the 5 V power source of the low voltage unit to a 15 V power source.

[0078] The conversion unit (133) may include a flyback converter. Accordingly, between the high voltage unit (110) and the low voltage unit (120), the only power supply element is the conversion unit (133), excluding the elements for communication (the first and second insulation units).

[0079] In this way, the elements arranged in the high voltage section (110) and the low voltage section (120) apply the conversion section (131), the first insulation section (132), and the second insulation section (133), and the position sensor section (118) for measuring the position of the motor (300) is arranged in the high voltage region, thereby eliminating the need for a connector or insulation section for the position sensor section (118). Through this, a miniaturized motor control device can be provided by reducing the number of connectors and insulation elements.

[0080] The position sensor unit (118) is positioned in an area of ​​the substrate adjacent to the area of ​​the substrate where the three phases of the motor (300) are connected, so as to detect the position of the motor. The position sensor unit (118) is positioned on the internal substrate of the motor control device (100) rather than externally, so that a sensor connection unit for receiving a signal from the position sensor unit (118) is not required.

[0081] The position sensor unit (118) may include a magnetic field sensor (Hall sensor), a TMR (Tunnel Magneto-Resistance), an AMR (Anisotropic Magneto-Resistance), a GMR (Giant Magneto-Resistance) sensor, etc. TMR is a special magnetic field sensor whose electric resistance changes according to a change in the magnetic field, and since the position sensor unit (118) is directly connected to the motor (300) through the substrate (510), the position of the motor (300) can be measured using TMR.

[0082] The conversion unit (131) can boost the second power of the low voltage unit (120) and provide the third power to the high voltage unit (110). As shown in Fig. 4, the power having a voltage of 7 V to 7.5 V output from the conversion unit (131) can be supplied to the first regulator (116). The first regulator (116) can reduce the input power (for example, reduce it to 5 V) and provide it to the position sensor unit (118). The position sensor unit (118) can include a position sensor IC (410) including a dual die 2 channel. The position sensor IC can be placed at a position corresponding to the position of the magnet (420) for detecting the position of the motor (300). According to the dual die 2 channel, the rotor position output signal 1 and the rotor position output signal 2 are transmitted to the control unit (114), and the control unit (114) can compare each output signal of the dual die 2 channel to determine whether the position sensor unit (118) is normal.

[0083] A motor control device (100) according to an embodiment of the present invention may be formed integrally with the motor (300) by being placed on a substrate (510) mounted inside a housing of the motor (300). As shown in FIG. 5, the motor control device (100) is formed integrally with the motor (300), and the motor (300) may be directly connected to the substrate (510) and a bus bar (520) to receive power. A motor position sensing IC (540) may be placed on an area of ​​the substrate (510) corresponding to a position of a magnet (530) for detecting the position of the motor (300), thereby detecting the position of the motor (300).

[0084] As described above, the motor control device is integrally assembled into the motor housing, so that the substrate and the three phases of the motor can be directly connected without the need for the existing three-phase cable line, and the position sensor can also be placed on the substrate to directly sense the motor rotor. In other words, rather than receiving the motor position signal from the outside, the motor position can be sensed by configuring the motor position sensor within the PCB, and by configuring the sensor circuit in the high-voltage area, the motor position sensing and the robustness of the motor position sensing can be secured by configuring it with the Rotor Position Sensor IC.

[0085] Those skilled in the art will appreciate that the present invention can be implemented in modified forms without departing from the essential characteristics of the above-described description. Therefore, the disclosed methods should be considered illustrative rather than restrictive. The scope of the present invention is set forth in the claims, not the foregoing description, and all differences within the scope equivalent thereto should be construed as being encompassed by the present invention.

Claims

1. A first power connector that receives the first power; A second power connection unit receiving a second power smaller than the first power; A driving unit that is directly connected to a motor and supplies the first power source to drive the motor; A position sensor unit that detects the position of the above motor; and It includes a control unit that generates a pulse modulation signal for driving the motor using the detection signal of the position sensor unit and transmits the signal to the driving unit. The first power connection unit, the driving unit, the position sensor unit, and the control unit are high voltage units that receive the first power, The above second power connection part is a low voltage part that receives the second power, A motor control device formed integrally with the above motor.

2. In paragraph 1, A motor control device including a substrate on which the first power connection unit, the driving unit, the position sensor unit, and the control unit are arranged.

3. In paragraph 2, The above driving unit is a motor control device directly connected to the three phases of the motor through the above substrate.

4. In paragraph 3, The above position sensor part, A motor control device placed in an area of ​​the substrate adjacent to an area of ​​the substrate to which the three phases of the above motor are connected.

5. In paragraph 1, The above position sensor part, A motor control device comprising a position sensor IC having dual die 2 channels.

6. In paragraph 5, The above control unit, A motor control device that compares each output signal of the above dual die 2 channels to determine whether the position sensor unit is normal.

7. In paragraph 1, It includes an insulation part and a conversion part connecting between the high voltage part and the low voltage part, The above-mentioned converter is a motor control device that insulates the high-voltage section and the low-voltage section and provides a third power source that has boosted the second power source to the high-voltage section.

8. In paragraph 7, The third power source is a motor control device provided to the driving unit.

9. In paragraph 8, A motor control device including a first regulator connected to the high voltage section and reducing the pressure of the third power supply.

10. In paragraph 9, The above first regulator is a motor control device that supplies power to the position sensor unit.

Images