Motor controller

Abstract

A controller according to one embodiment of the present invention comprises: a battery power source input terminal for receiving a battery power source from a battery; an ignition power source input terminal for receiving an ignition power source from the battery; a power source node connected to the battery power source input terminal or the ignition power source input terminal; an enable signal node connected to the ignition power source input terminal; a branch node branched from the ignition power source input terminal to the power source node and the enable signal node; a first diode connected between the branch node and the power source node; and a second diode connected between the branch node and the enable signal node.

Description

motor controller

[0001] The present invention relates to a motor controller.

[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, motor, battery, and high-voltage battery. The controller inside the vehicle controls the motors using electrical energy supplied by the battery. The LV power (VB) input terminal, which connects to the battery, has a potential safety issue if the fuse at the front of the VB blows, cutting off the power supply. This can cause safety-related signals to be unmonitored, potentially compromising stability.

[0005] The technical problem to be solved by the present invention is to provide a motor controller that supplies stable power when a battery power fuse is blown.

[0006] In order to solve the above technical problem, a controller according to an embodiment of the present invention may include a battery power input terminal receiving battery power from a battery; an ignition power input terminal receiving ignition power from a battery; a power node connected to the battery power input terminal or the ignition power input terminal; an enable signal node connected to the ignition power input terminal; a branch node branching from the ignition power input terminal into the power node and the enable signal node; a first diode connected between the branch node and the power node; and a second diode connected between the branch node and the enable signal node.

[0007] In addition, it may include a PWM controller and regulator in which a power terminal is connected to the power node and an enable signal input terminal is connected to the enable signal node; a first monitoring unit that operates with a voltage output from the regulator and monitors the power node; and a second monitoring unit that operates with a voltage output from the regulator and monitors the ignition power input terminal.

[0008] In addition, the device may include a first wake-up signal terminal that outputs a wake-up signal received through communication, the enable signal node may be connected to the first wake-up signal terminal, the first wake-up signal terminal may be connected to a rear end of the second diode, and a third diode may be connected between the first wake-up signal terminal and the rear end of the second diode.

[0009] Additionally, it may include a fourth diode connected between the battery power input terminal and the power node.

[0010] Additionally, the first monitoring unit may include a fifth diode connected to the front terminal of the fourth diode and connected between the first monitoring unit and the front terminal of the fourth diode.

[0011] Additionally, the second monitoring unit may be connected to the ignition power input terminal at the branch node front end, and may include a sixth diode connected between the second monitoring unit and the ignition power input terminal.

[0012] In addition, it includes a second wake-up signal terminal that outputs a wake-up signal received from an MCU, and the second wake-up signal terminal can be branched and connected to the enable signal input terminal of the PWM controller and the enable signal input terminal of the regulator.

[0013] In addition, it may include a seventh diode connected between the second wake-up signal terminal and the enable signal input terminal of the PWM controller; and an eighth diode connected between the second wake-up signal terminal and the enable signal input terminal of the regulator.

[0014] In addition, when an ignition voltage is applied to the ignition power input terminal, a reset signal terminal for outputting a signal for initializing the MCU is included, and the reset signal terminal can be connected to the enable signal input terminal of the PWM controller.

[0015] Additionally, when the first fuse connected between the battery and the battery power input terminal is blown, the power node can receive power from the ignition power input terminal.

[0016] According to embodiments of the present invention, even if the battery (VB) voltage is cut off when a fuse break occurs, the controller can be prevented from stopping its operation by operating with the ignition (IGN) voltage. In addition, even if the ignition voltage drops, the MCU can be prevented from being turned off immediately, and the MCU can be turned off after operating according to the off sequence, and when the ignition voltage is maintained, a forced initialization operation of a power element (PWM controller) can be performed through a separate signal for the MCU initialization function.

[0017] Figure 1 is a block diagram of a controller according to one embodiment of the present invention.

[0018] Figures 2 and 3 are block diagrams of a controller according to an embodiment of the present invention.

[0019] Figure 4 illustrates an example circuit implementation of a controller according to an embodiment of the present invention.

[0020] Figure 5 is a circuit diagram of a controller according to a comparative example 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 controller according to one embodiment of the present invention.

[0031] FIG. 2 and FIG. 3 are block diagrams of a controller according to an embodiment of the present invention, FIG. 4 illustrates a circuit implementation example of a controller according to an embodiment of the present invention, and FIG. 5 is a circuit diagram of a controller according to a comparative example of the present invention.

[0032] A controller (100) according to an embodiment of the present invention is composed of a battery power input terminal (110), an ignition power input terminal (120), a power node (130), an enable signal node (140), a branch node (150), a first diode (161), and a second diode (162), and may include a PWM controller (170), a regulator (180), a first monitoring unit (191), a second monitoring unit (192), a first wake-up signal terminal (193), a second wake-up signal terminal (194), a reset signal terminal (195), and third to eighth diodes (163 to 168).

[0033] The controller (100) according to an embodiment of the present invention may be a controller that controls a motor. It may be a device that controls a motor for an oil pump applied to a vehicle and may be installed in the vehicle. The controller (100) may be applied to various types of vehicles (e.g., hybrids, plug-in hybrids, etc.). Here, the oil pump may be applied to both an internal oil pump installed inside an oil pan and an external oil pump installed outside the oil pan.

[0034] The battery power input terminal (110) receives battery power from the battery (200), and the ignition power input terminal (120) receives ignition power from the battery (200). The battery (200) may be a low-voltage battery, and the battery power (e.g., constant power, VB) input from the battery (200) may be transmitted to the power node (130), and the ignition power (IGN) may be transmitted to the enable signal node (140).

[0035] A PWM controller (170) and a regulator (180) may be connected to the power node (130). In addition, a tracker (198) may be connected. The PWM controller (170) may include a power input terminal (171) and an enable signal input terminal (172). The regulator (180) may include a power input terminal (181) and an enable signal input terminal (182). When battery power is normally input, the PWM controller (170) and the regulator (180) may be driven by the battery power. The PWM controller (170) may control a PWM signal required to control a switch so that the controller (100) may control a motor, etc. The motor controlled by the controller (100) may be a three-phase motor, and the PWM controller (170) may control a switching unit to supply a three-phase voltage to the motor. The regulator (180) can convert the input power and output the voltage required for the internal components of the controller (100). The regulator (180) can receive battery power and output 5 V, which is the voltage required for the internal components of the controller (100), and the voltage output from the regulator (180) can be provided to the first monitoring unit (191) and the second monitoring unit (192).

[0036] The first monitoring unit (191) can monitor the power node (130). By monitoring the voltage, current, etc. of the power node (130), it can monitor whether it is operating normally or whether an abnormality occurs.

[0037] The second monitoring unit (192) can monitor the ignition power input terminal (120). By monitoring the voltage, current, etc. of the ignition power input terminal (120), it can monitor whether it is operating normally or whether an abnormality occurs.

[0038] A PWM controller (170) and a regulator (180) may be connected to the enable signal node (140). The PWM controller (170) and the regulator (180) may start operating by an enable signal. That is, they may operate only when an enable signal is applied to the enable signal node (140). The enable signal may include a wake-up signal. In a normal state, the PWM controller (170) and the regulator (180) may operate by receiving a signal from the enable signal node (140) and supplying power from the power node (130).

[0039] The battery (200) may include a first fuse (210) and a second fuse (220) to increase safety when supplying battery power and ignition power, and to prevent power from being supplied through the line in the event of a failure such as a short circuit or an open circuit. The first fuse (210) may be connected to the battery power input terminal (110), and the second fuse (220) may be connected to the ignition power input terminal (120). When an abnormal signal such as overcurrent or overvoltage occurs at the battery power input terminal (110), the first fuse (210) may be blown, and as a result, if battery power is not supplied to the controller (100), the controller (100) may not be able to operate normally.

[0040] In order to supply stable power to the controller (100) even when the first fuse (210) is blown, the ignition power input terminal (120) can be connected to not only the enable signal node (140) but also the power node (130). The ignition power input terminal (120) can be connected to a branch node (150) and branched into the power node (130) and the enable signal node (140). When the first fuse (210) is connected, the ignition voltage input through the ignition power input terminal (120) can be applied to the enable signal node (140) and used to apply an enable signal to the PWM controller (170) and the regulator (180). When the first fuse (210) is blown, the ignition voltage input through the ignition power input terminal (120) can be applied to the power node (130) as well as the enable signal node (140) to supply power to the PWM controller (170) and the regulator (180).

[0041] A first diode (161) may be connected between the branch node (150) and the power node (130), and a second diode (162) may be connected between the branch node (150) and the enable signal node (140). The second diode (162) may be a diode for preventing the ignition power from being reversely connected, and the first diode (161) may be a diode for forming an OR gate of a power supply or an enable signal for the ignition power.

[0042] FIG. 5 is a diagram illustrating a controller according to a comparative example of the present invention. As shown in FIG. 5, power can be supplied to a PWM controller (70) and a regulator (80) using power input to a battery power input terminal (10) or an ignition power input terminal (20) via a power node (30).

[0043] The battery power input terminal (10) can supply power to the PWM controller (70) and regulator (80) via the CMC (96), diode (64), DMC (97), and diode (65). The CMC (common mode choke) is a common mode choke, and the DMC (differential mode choke) is a differential mode choke that can remove noise. The common mode choke (CMC) can include a ferrite core or an iron core, and the differential mode choke (DMC) can include a ferrite core or a laminated silicon steel core.

[0044] The ignition power input terminal (20) is connected to the enable signal node (40) via a diode (61) to apply an enable signal to the PWM controller (70) and the regulator (80), or can supply power to the PWM controller (70) and the regulator (80) via diodes (62, 63). The regulator (80) can generate a 5 V voltage and supply it to the monitoring unit (91, 92) that monitors the power (LVDC) terminal or the ignition voltage.

[0045] The diode (64) between the CMC (96) and the DMC (97) is a diode for preventing reverse connection of the battery power, and the diode (65) at the rear end of the DMC (97) may be a diode for separating the LVDC_IN node for LVDC monitoring and the power. The diode (61) connected to the ignition power input terminal (20) is a diode for preventing reverse connection of the ignition, and the diode (66) connected to the CAN communication wake-up signal terminal (93) may be a diode for forming an OR gate of the CAN communication wake-up signal and the ignition power. The diodes (62, 63) are diodes for forming an OR gate of the LVDC power and the wake-up signal, and the voltage of the wake-up signal can be lowered by using two of them.

[0046] When the first fuse (210) is blown, the ignition power can be supplied as power and a notification can be provided to the upper controller. At this time, the ignition power input terminal (20) can be connected to the power node (30) through three diodes (61, 62, 63), and the voltage drops three times while passing through the three diodes. For example, when the battery voltage is 6 V, 6-0.7*3 = 3.9 V is applied through three voltage drops, making it difficult for the regulator (80) to generate sufficient voltage, and accordingly, the monitoring unit (91, 92) may not operate normally. The battery power input terminal (10) can also be supplied to the power node (30) through two diodes (64, 65), and may go through two voltage drops by the two diodes. For example, when the battery voltage is 6 V, 6-0.7*2 = 4.7 V is applied through two voltage drops, which may not provide sufficient voltage to the PWM controller (70) and regulator (80).

[0047] In contrast, as shown in FIGS. 1 to 4, the ignition power input terminal (120) can be connected to the power node (30) through one diode (161), and undergoes one voltage drop while passing through only one diode. For example, when the battery voltage is 6 V, 6-0.7 = 5.3 V is applied to the power node (130) through one voltage drop, so that the regulator (180) generates sufficient voltage, and accordingly, the first monitoring unit (191) and the second monitoring unit (192) can operate normally.

[0048] The first wake-up signal terminal (193) can output a wake-up signal received through communication including CAN communication, etc. The first wake-up signal terminal (193) can be connected to an enable signal node (140) and apply a wake-up signal to the enable signal node (140) together with the ignition power of the ignition power input terminal (120). At this time, the first wake-up signal terminal (193) can be connected to the rear end of the second diode (162), and a third diode (163) can be connected between the first wake-up signal terminal (193) and the rear end of the second diode (162). The third diode (163) can be a diode for forming an OR gate with the wake-up signal of the first wake-up signal terminal (193). When at least one of the ignition power or the wake-up signal of the first wake-up signal terminal (193) is applied to the enable signal node (140), the PWM controller (70) and the regulator (80) can start operating.

[0049] The fourth diode (164) may be connected between the battery power input terminal (110) and the power node (130). The fourth diode (164) may be a diode for preventing reverse connection of the battery power input terminal (110). At this time, the fourth diode (164) may be connected to the rear end of the CMC (196) and the DMC (197). Here, the CMC (common mode choke) is a common mode choke, and the DMC (differential mode choke) is a differential mode choke that can remove noise. The common mode choke (CMC) may include a ferrite core or an iron core, and the differential mode choke (DMC) may include a ferrite core or a laminated silicon steel core.

[0050] The first monitoring unit (191) may be connected to the front terminal of the fourth diode (164), and the fifth diode (165) may be connected between the first monitoring unit (191) and the front terminal of the fourth diode (164). The fifth diode (165) may be a diode that separates the first monitoring unit (191) from the power node (130) for monitoring battery power.

[0051] The second monitoring unit (192) is connected to the ignition power input terminal (120) in front of the branch node (150), and the sixth diode (166) can be connected between the second monitoring unit (192) and the ignition power input terminal (120). The sixth diode (166) can be a diode that separates the second monitoring unit (192) from the enable signal node (140) for monitoring the ignition power.

[0052] The second wake-up signal terminal (194) can output a wake-up signal received from the MCU. The second wake-up signal terminal (194) can be branched and connected to the enable signal input terminal (172) of the PWM controller (170) and the enable signal input terminal (182) of the regulator (180). Here, a seventh diode (167) can be connected between the second wake-up signal terminal (194) and the enable signal input terminal (172) of the PWM controller (170), and an eighth diode (168) can be connected between the second wake-up signal terminal (194) and the enable signal input terminal (182) of the regulator (180). The second wake-up signal terminal (194) can apply the wake-up signal received from the MCU to the enable signal input terminal (172) of the PWM controller (170) and the enable signal input terminal (182) of the regulator (180). In this way, in order to prevent the MCU from unexpectedly turning off by turning off all power when the ignition voltage drops, such as when the battery is discharged or the second fuse is blown, even if the voltage of the ignition power drops, the MCU can prevent the MCU from turning off immediately by applying the wake-up signal (LV_WAKE) in parallel to the second wake-up signal terminal (194). In this way, the MCU can be stably turned off after going through the off sequence.

[0053] The reset signal terminal (195) can output a signal for initializing the MCU when the ignition voltage is applied to the ignition power input terminal (120). The reset signal terminal (195) can be connected to the enable signal input terminal (172) of the PWM controller (170). The reset signal terminal (195) can include a reset switch (169). Unlike the second wake-up signal terminal (194), a signal (Hard_RST) can be configured in parallel and applied to the enable signal input terminal (172) of the PWM controller (170) to forcibly turn off the power to initialize the MCU (Hard Reset function) when the ignition power is applied. Through this, a function for forcibly initializing the PWM controller (170) through a separate signal can be provided while the voltage of the ignition power is maintained.

[0054] As described above, by configuring the power terminal of the controller including the battery power input terminal and the ignition power input terminal, even if the fuse connected to the battery power input terminal blows and the battery (VB) voltage is cut off, the controller can be operated with the ignition (IGN) voltage, thereby preventing the operation of the controller from stopping. In addition, even if the ignition voltage drops, the MCU can be prevented from being turned off immediately, and the MCU can be turned off after operation according to the off sequence, and when the ignition voltage is maintained, a forced initialization operation of the power element (PWM controller) can be performed through a separate signal for the MCU reset function.

[0055] Meanwhile, embodiments of the present invention can be implemented as computer-readable code on a computer-readable recording medium. Computer-readable recording media include all types of recording devices that store data that can be read by a computer system.

[0056] Examples of computer-readable recording media include ROM, RAM, CD-ROM, magnetic tape, floppy disk, and optical data storage devices. In addition, the computer-readable recording media can be distributed across network-connected computer systems, so that computer-readable code can be stored and executed in a distributed manner. In addition, functional programs, codes, and code segments for implementing the present invention can be easily inferred by programmers in the technical field to which the present invention pertains.

[0057] 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. Battery power input terminal that receives battery power from the battery; An ignition power input terminal that receives ignition power from the above battery; A power node connected to the battery power input terminal or the ignition power input terminal; An enable signal node connected to the above ignition power input terminal; A branch node branching from the ignition power input terminal to the power node and the enable signal node; A first diode connected between the branch node and the power node; and A controller including a second diode connected between the branch node and the enable signal node.

2. In paragraph 1, A PWM controller and regulator having a power terminal connected to the power node and an enable signal input terminal connected to the enable signal node; A first monitoring unit that operates on the voltage output from the regulator and monitors the power node; and A controller that operates on a voltage output from the above regulator and includes a second monitoring unit that monitors the ignition power input terminal.

3. In paragraph 2, Includes a first wake-up signal terminal that outputs a wake-up signal received through communication, The above enable signal node is connected to the first wake-up signal terminal, The above first wake-up signal terminal is connected to the rear end of the second diode, A controller including a third diode connected between the first wake-up signal terminal and the rear end of the second diode.

4. In paragraph 2, A controller including a fourth diode connected between the battery power input terminal and the power node.

5. In paragraph 4, The above first monitoring unit is connected to the front end of the fourth diode, A controller including a fifth diode connected between the first monitoring unit and the front end of the fourth diode.

6. In paragraph 2, The above second monitoring unit is connected to the ignition power input terminal at the branch node front end, A controller including a sixth diode connected between the second monitoring unit and the ignition power input terminal.

7. In paragraph 2, Includes a second wake-up signal terminal that outputs a wake-up signal received from the MCU, A controller in which the second wake-up signal terminal is branched and connected to the enable signal input terminal of the PWM controller and the enable signal input terminal of the regulator.

8. In paragraph 7, A seventh diode connected between the second wake-up signal terminal and the enable signal input terminal of the PWM controller; and A controller including an eighth diode connected between the second wake-up signal terminal and the enable signal input terminal of the regulator.

9. In paragraph 2, When ignition voltage is applied to the ignition power input terminal, a reset signal terminal is included that outputs a signal to initialize the MCU. The above reset signal terminal is a controller connected to the enable signal input terminal of the above PWM controller.

10. In paragraph 1, A controller that receives power from the ignition power input terminal when the first fuse connected between the battery and the battery power input terminal is blown.

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