JP2005012966A - Rotating machine with driving circuit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize an idling stop system at a low cost. <P>SOLUTION: An inverter 3100 includes an inverter part 3102 which is connected to a motor generator 3000, and which supplies three-phase electric power; a thermistor 3104 for detecting MOS temperature; a field abnormality detecting portion and a lock determining portion 3108 for detecting the field abnormality or determining a motor lock; the circuit for indicating power generation prohibition and eco-run prohibition to the inverter circuit 3102 based on the signal from the thermistor 3104, the field abnormality detecting portion, and the lock determining portion 3108 by the inverter 3100 body; and a control circuit unit 3110 for generating a TEMP signal of which a duty ratio is changed so as to identify the contents indicated from the inverter circuit 3102, and outputting it to the EFI_ECU based on the signal from the thermistor 3104, the field abnormality detecting portion, and the lock determining portion 3108. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electric device mounted on a vehicle including an engine and a motor generator using a battery as a power source, and in particular, the engine of the vehicle is stopped as much as possible during idling to prevent global warming and save resources. The present invention relates to a rotating electrical machine such as a motor generator mounted on a vehicle.
[0002]
[Prior art]
From the viewpoint of global warming prevention and resource saving, when the vehicle stops at a red light at an intersection, etc., the engine is automatically stopped and the driver operates to start again (for example, by depressing the accelerator pedal) Also, it is also called an idling stop system (economy running system, engine automatic stop and start system) that restarts the engine when the brake pedal is depressed or the shift lever is switched to the forward travel position. It may be described as “eco-run system”). In this system, a secondary battery such as a lead storage battery or a lithium battery is mounted to supply power to auxiliary equipment (air conditioners, headlamps, audio, etc.) while the vehicle is stopped. While the vehicle is stopped, electric power is supplied from the secondary battery to these auxiliary machines. When the engine is restarted, the engine is restarted by rotating the crankshaft by an electric motor such as a motor generator or a starter motor using the power of the secondary battery.
[0003]
When such an engine restart is performed using an electric motor such as a motor generator or a starter motor, a so-called warm lock phenomenon may occur. When the engine is started, the engine is cranked and torque is applied by such an electric motor, and the applied torque causes the engine to resist the compression pressure in the engine combustion chamber and the mechanical resistance due to the friction between the piston and the cylinder inner wall surface. It is rotated. At this time, for example, at the time of warm start, the compression pressure becomes high, so the piston stops near the top dead center and the engine does not turn any further. This is a so-called warm lock phenomenon.
[0004]
When engine start failure due to such warm lock occurs, even if torque is applied by the electric motor in the forward rotation direction of the engine, the piston is held in a state of stopping near the top dead center, and the mechanical resistance against this is due to static friction. Therefore, the resistance value is large and the inertia torque by the flywheel or the like cannot be obtained. If the electric motor is further operated in this state, the value of the current flowing through the electric motor increases, and the temperature of the electric motor rises due to the heat generation, or the supply of electric power to the electric motor is interrupted. This is a phenomenon called the state where the electric motor is locked. In such a case, an abnormality is detected in the drive circuit that drives the electric motor. Regarding these, there is a technique disclosed in the following publications.
[0005]
Japanese Patent Application Laid-Open No. 7-184361 (Patent Document 1) discloses a vehicular generator-motor apparatus that improves pressure resistance during power generation operation of an AC-DC conversion element of a vehicular generator-motor and lowers on-resistance during electric operation. To do. The vehicular generator-motor apparatus includes a rotating field magnetic pole that rotates together with a rotating shaft coupled to a crankshaft of an engine, an armature coil that is fixed to a housing, and an armature coil that is wound around the armature coil. An AC-DC converter circuit composed of a plurality of MOSFETs (Metal Oxide Semiconductor Field-Effect Transistors) connected between the armature coil and the battery, and a MOSFET of the AC-DC converter circuit is generated in the armature coil. The power generation mode for charging the battery by converting the alternating current output to the direct current output, and the armature coil energize the armature coil so that the armature coil forms a rotating magnetic field having a constant phase difference with respect to the magnetic field of the rotating field magnetic pole A switching circuit for switching to an electric mode to be operated, and MOSFE T is formed using SiC as a material.
[0006]
According to this vehicular generator-motor apparatus, by applying SiC to the MOSFET of the AC-DC conversion means that is required to have a high withstand voltage during power generation and a low on-resistance against a large current during power generation, a voltage drop occurs in the element section. As a result, the amount of lost power is remarkably reduced, and almost the battery voltage can be applied as it is to the armature winding, so that a good driving torque can be obtained.
[0007]
Japanese Patent Laid-Open No. 2000-333468 (Patent Document 2) is excellent in usability while suppressing the deterioration of the element protection function by adopting different power regulation modes depending on the abnormal state of IGBT (Insulated Gate Bipolar Transistor). A power switching device is disclosed. This power switching device detects an abnormal state of the power switching element based on the detected state quantity of the power switching element and the power switching element, outputs an abnormal signal indicating the abnormal state, and interrupts the power switching element in the abnormal state And a power switching device including an external control unit that is provided outside the power module and regulates the energization power of the power switching element when receiving an abnormal signal from the abnormality detection unit. Based on the abnormal signal, the element protection unit discriminates between an emergency abnormal state that requires immediate interruption of the power switching element and a non-emergency abnormal state that does not require immediate interruption of the power switching element but that requires some sort of energizing power limitation. Emergency abnormality signals and non- Outputs an abnormal signal to the external control unit, shuts off the power switching element in an emergency abnormal state, does not shut off the power switching element in a non-emergency abnormal state, and the external control unit shuts off the power switching element when an emergency abnormal signal is received Then, the energization power of the power switching element is partially limited when the non-emergency abnormality signal is received.
[0008]
In this power switching device, a power module in which a power switching element and an element protection unit that detects the abnormal state and shuts off the power switching element when the abnormal state occurs are housed in the same module, and is further connected to an external control unit. Therefore, the power switching element is cut off when the emergency abnormality signal is received, and a protection operation is performed to partially limit the energization power of the power switching element when the non-emergency abnormality signal is received. The non-emergency abnormality signal is generated when an abnormality that does not require an emergency shutoff of the power switching element, for example, when the degree of superheat gradually approaches a predetermined allowable maximum temperature. In this way, in an emergency abnormal state, the power switching element can be instantly shut down (self-shutoff) inside the module to ensure destruction protection and also be shut off externally (external shut-off). (There is a delay time from the above self-shutoff due to delay, etc.), so this double shut-off operation can further ensure shut-off, and in the non-emergency abnormal state, the self-shutoff and external shut-off are prohibited and energized It is possible to maintain the drive of the power switching element while regulating the heat generation of the power switching element within the allowable range due to regulation (frequency reduction or AC voltage decrease), and it is easy to use while suppressing the deterioration of the element protection function A power switching device can be realized.
[0009]
[Patent Document 1]
JP-A-7-184361
[Patent Document 2]
JP 2000-333468 A [0011]
[Problems to be solved by the invention]
However, the above publication has the following problems.
[0012]
In the vehicular generator-motor apparatus disclosed in Patent Document 1, the temperature signal of the power element of the inverter and the local interruption (field overheating, field overcurrent, lock detection, etc.) of the inverter are sent to an external ECU (Electronic Control Unit). It cannot be realized at low cost. That is, in Patent Document 1, a new output unit or interface is required to notify the outside of the inverter of the abnormality detected inside the inverter so that the type of the abnormality can be understood. Costs cannot be achieved.
[0013]
In the power switching device disclosed in Patent Document 2, when outputting an abnormal signal to the external control unit, at least the abnormal signal non-output state, the emergency abnormal signal output state, and the non-emergency abnormal signal output state are respectively different duty ratios. PWM (Pulse Width Modulation) signals, particularly preferably three PWM signals having 0%, intermediate duty ratio (20 to 80)%, and 100% duty ratio. For this reason, although it is effective in the apparatus which performs PWM control, the apparatus applicable to the idling stop system which can be implement | achieved at low cost as follows cannot be provided.
[0014]
Hereinafter, an idling stop system that can be realized at low cost will be described.
[0015]
In order to realize a low-cost idling stop system, the following design policy is adopted. The electric power source of the electric motor that restarts the engine is only one battery (for example, a 14V lead acid battery that is already widely used and inexpensive), and the restart of the engine is based on the meshing of a gear like a starter motor Use of a motor generator connected to a crankshaft of an engine via a belt without generating abnormal noise and having a better start response than a starter motor, and a PCU (Power Control) including the motor generator and an inverter circuit as a drive circuit thereof (Unit) is to be as cheap as possible.
[0016]
In order to reduce the cost of motor generators and PCUs, it is currently possible to improve alternators that are generally installed in vehicles and are widely spread and inexpensive (for example, using the alternator's armature and rotor parts as they are). It is considered that the rectifier circuit is replaced with an inverter circuit) and that the PCU is air-cooled instead of water-cooled.
[0017]
In the case of realizing such a system, it is preferable to use a motor generator as much as possible for restarting the engine in the idling stop system because no abnormal noise is generated and responsiveness is high. On the other hand, the armature portion, the rotor portion, and the like are driven as motors using general-purpose alternator parts, and the engine is cranked. Since this cranking requires a very large torque, the engine is restarted under severe conditions for the low-voltage battery, the general-purpose alternator and the air-cooled PCU.
[0018]
In such a case, with the configuration described in Patent Document 1 and Patent Document 2 described above, the price of the inverter circuit that is the driver circuit of the motor generator increases.
[0019]
Therefore, in order to realize a low-cost idling stop system, it is necessary to simplify the portion for outputting the abnormality to the outside of the inverter and make the inverter as cheap as possible.
[0020]
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a rotating electrical machine with a drive circuit mounted on a vehicle for realizing an inexpensive idling stop system. .
[0021]
[Means for Solving the Problems]
The rotating electrical machine with a drive circuit according to the first invention is mounted on a vehicle equipped with an idling stop system that temporarily stops the engine when the state of the vehicle satisfies a predetermined condition. This rotating electrical machine has a function of restarting the engine after a temporary stop or a function of generating power during regenerative braking of the vehicle. The rotating electrical machine performs a plurality of abnormality processing corresponding to the type of abnormality detected by the detecting circuit for detecting the abnormality of the driving circuit for driving the rotating electrical machine, the rotating electrical machine or the driving circuit, and the detecting means, Control means for controlling to output a plurality of signals corresponding to a plurality of abnormality processes using a single output terminal.
[0022]
According to the first invention, the rotating electrical machine with a drive circuit is, for example, a motor generator with an inverter circuit, and is mounted on a vehicle equipped with an idling stop system. The motor generator functions as a motor when the engine is restarted and / or functions as a generator during regenerative braking of the vehicle. In such a motor generator with an inverter circuit, if the detection means detects an abnormality such as field overheating or field overcurrent, a motor lock, or a temperature abnormality of the power element of the inverter, the control means itself fails. Perform processing. This abnormality processing is that the motor generator with an inverter circuit itself cuts off the function locally, and it is necessary to notify this to an external control unit. At this time, the control means can distinguish and output a plurality of signals corresponding to a plurality of abnormality processes using one output terminal. Therefore, an interface with an external control unit can be realized at low cost. As a result, it is possible to provide a rotating electrical machine with a drive circuit mounted on a vehicle for realizing an inexpensive idling stop system.
[0023]
In the rotating electrical machine with a drive circuit according to the second aspect of the invention, in addition to the configuration of the first aspect of the invention, the control means corresponds to the prohibition command for the idling stop system and the power generation function corresponding to the detected abnormality type. Means for controlling so as to distinguish and output the prohibition command using one output terminal is included.
[0024]
According to the second invention, for example, when an abnormality such as field overheating or field overcurrent or motor lock is detected, an instruction to prohibit the power generation function is issued based on the temperature abnormality of the power element of the inverter. A prohibition command can be output.
[0025]
In the rotating electrical machine with a drive circuit according to the third invention, in addition to the configuration of the second invention, the detection means includes a means for detecting an abnormality based on the temperature of the electric element of the drive circuit. The control means further includes a determination means for determining a prohibition command based on the detected temperature of the electric element.
[0026]
According to the third aspect of the invention, for example, the temperature of the power MOS that is an electric element of the inverter circuit is detected, and the prohibition command for the idling stop system can be output according to the temperature range.
[0027]
In the rotating electrical machine with a drive circuit according to the fourth aspect of the invention, in addition to the configuration of the third aspect of the invention, the discrimination means discriminates the prohibition command based on the temperature of the cooling fin that cools the power element that is an electrical element. Means for including.
[0028]
According to the fourth invention, the temperature of the cooling fin for cooling the power MOS can be detected by the thermistor, and it can be determined that it is a prohibition command for the idling stop system and can be output using one output terminal. .
[0029]
In the rotating electrical machine with a drive circuit according to the fifth invention, in addition to the configuration of any one of the first to fourth inventions, the rotating electrical machine is a motor generator, and the drive circuit is an inverter circuit.
[0030]
According to the fifth aspect of the invention, it is possible to realize an idling stop system in which the rotating electrical machine is a motor generator and the drive circuit is an inverter circuit that supplies three-phase power to the motor generator.
[0031]
In the rotating electrical machine with a drive circuit according to the sixth invention, in addition to the configuration of the fifth invention, the armature and the rotor of the motor generator are parts of an alternator, and the inverter circuit is an air-cooled inverter circuit It is.
[0032]
According to the sixth invention, since the motor generator is manufactured using the alternator parts, it can be manufactured at low cost. Furthermore, since the inverter circuit is air-cooled rather than water-cooled, the inverter circuit can be manufactured at low cost. An inexpensive rotary electric machine with a drive circuit in which this inverter circuit is integrated with a motor generator can be provided.
[0033]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same parts are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed description thereof will not be repeated.
[0034]
With reference to FIG. 1, the control block diagram of the vehicle which concerns on embodiment of this invention is demonstrated. In the following description, the power train of the vehicle will be described as having a torque converter and a gear type transmission mechanism, but the present invention is not limited to this. For example, instead of a gear-type transmission mechanism, a CVT (Continuously Variable Transmission) such as a belt type or a toroidal type may be used.
[0035]
As shown in FIG. 1, the power train of this vehicle includes an engine 100 as a general internal combustion engine, a torque converter 200 that is a fluid coupling connected to the output shaft of the engine 100 and having a torque amplification function, and torque A gear-type speed change mechanism 300 connected to the output shaft of the converter 200. Crankshaft pulley 402 of engine 100 is connected to motor generator pulley 400 of motor generator 3000, air conditioner compressor pulley 404 of air conditioner compressor 1102, and water pump pulley 406 of water pump 1104 via belt 410.
[0036]
In this vehicle, an engine 100 is controlled by an EFI_ECU (Electronic Fuel Injection_Electronic Control Unit) 1200 to execute an idling stop system. The idling stop system transmits establishment of the idling stop condition to the HV_ECU (not shown) when the state quantity of the vehicle regarding the eco-run condition input to the EFI_ECU 1200 satisfies a predetermined condition. When the eco-run condition is not satisfied, the EFI_ECU 1200 supplies the electric power of the secondary battery 2000 from the inverter 3100 to the motor generator 3000 to cause the motor generator 3000 to function as a motor and the crank of the engine 100 via the motor generator pulley 400 and the belt 410. The shaft pulley 402 is rotated to restart the engine 100 (cranking). Here, inverter 3100 is an air-cooled inverter, and receives an M / G switching command signal and an RLO power generation command signal from EFI_ECU 1200.
[0037]
EFI_ECU 1200 controls the current value of field current If of motor generator 3000 using the RLO power generation command signal to inverter 3100. A TEMP signal is input from the inverter 3100 to the EFI_ECU 1200. The TEMP signal is input to the EFI_ECU 1200 with the duty switched from 0 to 100%.
[0038]
As the secondary battery 2000, a general lead storage battery having a rated voltage of 14V is used. The secondary battery 2000 is controlled by the battery ECU 1300. Electric power is supplied from secondary battery 2000 to inverter 3100 and starter motor 3200, and engine 100 is restarted after idling is stopped by motor generator 3000 or starter motor 3200. When the ignition switch is set to the start position, engine 100 is started by starter motor 3200 as usual.
[0039]
Secondary battery 2000 is connected to auxiliary ECU 1100 via voltage drop prevention mechanism 2100 (for example, a backup boost converter, a capacitor, a lithium battery, etc.). The auxiliary machine ECU 1100 is connected to the air conditioner compressor 1102 and the water pump 1104, and the auxiliary machine ECU 1100 controls the air conditioner compressor 1102 and the water pump 1104. Since engine 100 is stopped when idling is stopped, air conditioner compressor pulley 404 and water pump pulley 406 cannot be rotated by belt 410 via crankshaft pulley 402 of engine 100. Therefore, auxiliary machine ECU 1100 controls to drive air conditioner compressor 1102 and water pump 1104 using the power of secondary battery 2000.
[0040]
Also, an oil pump (not shown) is operated using the secondary battery 2000 at the time of idling stop, similarly to the water pump 1104.
[0041]
The air conditioner compressor 1102 and the water pump 1104 have a function of selecting either the engine compressor pulley 404 or the water pump pulley 406 or the motor driven by the electric power from the secondary battery 2000. Have. Further, instead of these functions, an electromagnetic clutch is provided on the crankshaft pulley 402 of the engine 100, and when idling is stopped, the electromagnetic clutch is in a non-transmitting state and the engine 100 is disconnected. The water pump 1104 may be operated.
[0042]
FIG. 2 shows a configuration of motor generator 3000 of FIG. As shown in FIG. 2, motor generator 3000 used in the vehicle according to the present embodiment is a low-cost motor generator using parts of a general-purpose alternator.
[0043]
Usually, the alternator is rotated by a pulley 3030 connected to the crankshaft pulley 402 of the engine 100 via a belt 410, and the electric power generated in the alternator stator unit 3020 by the rotation of the alternator rotor unit 3010 is rectified called a rectifier. The circuit converts the alternating current into direct current and supplies the generated power to the secondary battery 2000.
[0044]
Such a general-purpose alternator is widely used in general vehicles, and its manufacturing cost is very low. The alternator rotor portion 3010 and the alternator stator portion 3020 are used as the rotor portion and the stator portion of the motor generator 3000 according to the embodiment of the present invention. The pulley 3030 shown in FIG. 2 is the same as the motor generator pulley 400 shown in FIG.
[0045]
An inverter 3100 is used instead of a rectifier circuit called a rectifier. Inverter 3100 is a driver that causes alternator rotor portion 3010 and alternator stator portion 3020 to function as motor generator 3000. This inverter 3100 is an air-cooled inverter. The cost can be reduced by using an air-cooled inverter as compared with a water-cooled inverter.
[0046]
FIG. 3 shows an electric circuit diagram of motor generator 3000 and an electric circuit diagram of inverter 3100. As shown in FIG. 3, the inverter 3100 includes an inverter circuit 3102 configured to supply power for three phases to the alternator stator unit 3020 by a plurality of switching circuits. Further, by controlling the current value of the field current If flowing through the alternator rotor unit 3010, the torque generated from the motor generator 3000 can be controlled when the motor generator 3000 is caused to function as a motor, and the motor generator 3000 is used as a generator. When functioning, the amount of power generation can be controlled.
[0047]
The secondary battery 2000 supplies power to the switching circuit of the inverter circuit 3102 and supplies power to the alternator stator unit 3020 and the alternator rotor unit 3010.
[0048]
Inverter 3100 is provided with a terminal to which an MFI switching command signal from EFI_ECU 1200 is input, a terminal to which an RLO power generation command signal is input, and a terminal from which a TEMP signal to EFI_ECU 1200 is output. These terminals are connected to the control unit 3110.
[0049]
The input terminal to which the M / G switching command signal is input is set to receive a high signal when the motor generator 3000 functions as a motor and to receive a low signal when the motor generator 3000 functions as a generator. Therefore, either a high side signal or a low side signal is input.
[0050]
A signal in which the power generation command value is expressed by a predetermined duty ratio is input to the input terminal to which the RLO power generation command signal is input.
[0051]
Furthermore, a signal can be output to EFI_ECU 1200 at a different duty ratio at the output terminal from which the TEMP signal is output so as to distinguish and indicate the contents of the abnormality processing inside inverter 3100.
[0052]
The inverter circuit 3102 is provided with a fin for air cooling, and a thermistor 3104 for measuring the temperature of the fin. The MOS temperature signal from the thermistor 3104 is input to the control unit 3110. An abnormality (field overheating, field overcurrent, etc.) and motor lock of the field current If of the alternator rotor unit 3010 and a motor lock are detected by the field abnormality detection unit and the lock determination unit 3108, and an abnormal signal is sent to the control unit 3110. Send.
[0053]
As shown in FIG. 3, the self-diagnosis process of inverter 3100 is performed by the MOS temperature signal and the abnormality signal without using control unit 3110. Before the MOS temperature signal and the abnormality signal are input to the control unit 3110, the following self-diagnosis process is performed.
[0054]
When the abnormal signal from the field abnormality detection unit and lock determination unit 3108 is turned on, the inverter circuit 3102 is instructed to prohibit power generation. If the temperature signal from the thermistor 3104 indicates an abnormally high temperature, the inverter circuit 3102 is instructed to prohibit power generation. If the temperature signal from the thermistor 3104 indicates an abnormal temperature (a temperature lower than the abnormally high temperature but higher than the normal temperature), the inverter circuit 3102 is instructed to stop idling (eco-run prohibition).
[0055]
With reference to FIG. 4, the control structure of the abnormal output program executed by control unit 3110 in FIG. 3 will be described.
[0056]
At step (hereinafter step is abbreviated as S) 100, control unit 3110 determines whether or not the abnormal signal is off. This determination is made based on whether or not an abnormality signal is input to control unit 3110 from field abnormality detection unit and lock determination unit 3108. If the abnormal signal from field abnormality detection unit and lock determination unit 3108 is off (YES in S100), the process proceeds to S200. If not (NO in S100), the process proceeds to S3000.
[0057]
In S200, control unit 3110 detects the MOS temperature. This process is performed based on the MOS temperature signal input from the thermistor 3104 to the controller 3110. In S400, it is determined whether or not the MOS temperature detected in S300 is in an inappropriate range. If the MOS temperature is in an inappropriate range (YES in S400), the process proceeds to S2000. If not (NO in S400), the process proceeds to S500 because the MOS temperature is in the abnormal range. That is, the process of S2000 is performed when the MOS temperature is a low temperature in a range where the MOS temperature is not normal, and the process of S500 is performed when the MOS temperature is a high temperature within a range where the MOS temperature is not normal.
[0058]
In S500, control unit 3110 determines that the MOS temperature detected in S300 is abnormal. Thereafter, the process proceeds to S3000.
[0059]
In S1000, control unit 3110 sets the duty value of the TEMP signal to 25% (normal processing). In S2000, control unit 3110 sets the duty value of the TEMP signal to 50% (eco-run prohibition self-processing). At S3000, control unit 3110 sets the duty value of the TEMP signal to 75% (power generation prohibition self-processing).
[0060]
At S4000, control unit 3110 outputs a TEMP signal to EFI_ECU 1200.
[0061]
Operations of motor generator 3000 and inverter 3100 according to the present embodiment based on the above-described structure and flowchart will be described.
[0062]
[Field abnormalities and motor locks]
Regarding motor generator 3000 and inverter 3100 mounted on the vehicle, when motor generator 3000 locks engine 100 during cranking, field abnormality detection unit and lock determination unit 3108 detect abnormality. The abnormality signal is turned on by the field abnormality detection unit and lock determination unit 3108, and the inverter circuit 3102 is instructed to perform self-processing for prohibiting power generation. An ON state abnormal signal is also input to control unit 3110 (NO in S100), and duty value of TEMP signal is set to 75% (power generation prohibition self-processing) by control unit 3110, and the TEMP signal is output. (S4000).
[0063]
Since EFI_ECU 1200 has a duty value of 75% for this TEMP signal, self-processing for prohibiting power generation is performed inside inverter 3100 and it can be detected that motor generator 3000 is in a state where power generation cannot be performed.
[0064]
At this time, cranking of engine 100 by motor generator 3000 is executed by changing to cranking by starter motor 3200, or control is performed so as not to perform power generation processing during regenerative braking of the vehicle.
[0065]
[MOS temperature abnormal range]
When the motor generator 3000 and the inverter 3100 mounted on the vehicle are in operation, the MOS temperature of the inverter circuit 3102 (specifically, the temperature of the MOS cooling fin) becomes high and becomes abnormal. Self processing is instructed. The MOS temperature signal is also input to the control unit 3110 (S200), and the MOS temperature is not normal but is high enough to exceed the inappropriate range, so it is not the inappropriate range but the abnormal range (NO in S300). , NO in S400), the control unit 3110 sets the duty value of the TEMP signal to 75% (power generation inhibition self-processing), and the TEMP signal is output (S4000).
[0066]
Since EFI_ECU 1200 has a duty value of 75% for this TEMP signal, self-processing for prohibiting power generation is performed inside inverter 3100 and it can be detected that motor generator 3000 is in a state where power generation cannot be performed.
[0067]
In this case as well, cranking of engine 100 by motor generator 3000 is executed by changing to cranking by starter motor 3200, or control is performed so that power generation processing during regenerative braking of the vehicle is not performed.
[0068]
[MOS temperature inappropriate range]
While the motor generator 3000 and the inverter 3100 mounted on the vehicle are in operation, the MOS temperature of the inverter circuit 3102 (specifically, the temperature of the MOS cooling fin) becomes high and becomes abnormal. Processing is instructed. The MOS temperature signal is also input to the control unit 3110 (S200), and the MOS temperature is in a range that is not normal and in an inappropriate range, and thus is not an abnormal range but an inappropriate range (NO in S300, S400) YES), the control unit 3110 sets the duty value of the TEMP signal to 50% (eco-run prohibition self-processing) and outputs the TEMP signal (S4000).
[0069]
Since the duty value of the TEMP signal is 50%, the EFI_ECU 1200 can detect that the eco-run prohibition self-processing is performed inside the inverter 3100 and that the eco-run is not currently possible.
[0070]
At this time, the vehicle is controlled to limit the eco-run control.
[normal]
When the motor generator 3000 and the inverter 3100 mounted on the vehicle are in operation and the MOS temperature of the inverter circuit 3102 (specifically, the temperature of the MOS cooling fin) is normal, the inverter circuit 3102 is not instructed to perform any self-processing. Since the MOS temperature signal is also input to control unit 3110 (S200) and the MOS temperature is normal (YES in S300), the control unit 3110 sets the duty value of the TEMP signal to 25%, and the TEMP signal Is output (S4000).
[0071]
Since the duty value of the TEMP signal is 25%, the EFI_ECU 1200 can detect that it is currently normal without performing self-processing inside the inverter 3100.
[0072]
As described above, according to the motor generator and the inverter according to the present embodiment, when an abnormality is detected by the inverter itself, self-processing is performed to the inverter circuit to instruct power generation stop and eco-run prohibition. At this time, the control unit distinguishes the duty ratio of the TEMP signal into three types (25%, 50%, and 75%) and outputs it to the EFI_ECU.
[0073]
For this reason, with the addition of one output terminal (or when the output terminal for the MOS temperature signal is already installed, it is not necessary), the EFI_ECU detects a plurality of abnormalities occurring in the motor generator and the inverter. The type of abnormality can be determined. Such a motor generator can be made inexpensive because it uses a rotor portion and a stator portion of a general general-purpose alternator and has an easy interface.
[0074]
In addition, when the MOS temperature is an abnormal temperature range that is high enough to exceed the inappropriate range (is not an inappropriate range but an abnormal range), power generation prohibition processing is performed by the inverter itself, and a duty value is sent to an external ECU. When the TEMP signal is set to 75% and the MOS temperature is in a range that is not normal and in the inappropriate range (instead of the abnormal range, it is in the inappropriate range), the inverter itself performs an eco-run prohibition process. The TEMP signal with the duty value set to 50% is output to the external ECU, but the present invention is not limited to this. Since it is the gist of the present invention that the abnormality processing executed inside the inverter can be notified to the external ECU with one signal line so that the types can be distinguished and identified, other than those described above One example is when processing is performed.
[0075]
The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.
[Brief description of the drawings]
FIG. 1 is a control block diagram of a vehicle according to an embodiment of the present invention.
FIG. 2 is a diagram showing a configuration of the motor generator of FIG. 1;
FIG. 3 is an electric circuit diagram of a motor generator and an inverter.
4 is a flowchart showing a control structure of an abnormal output program executed by the control unit of FIG. 3;
[Explanation of symbols]
100 Engine, 200 Torque converter, 300 Gear-type transmission mechanism, 400 Motor generator pulley, 402 Crankshaft pulley, 404 Air-conditioner compressor pulley, 406 Water pump pulley, 410 belt, 1100 Auxiliary ECU, 1200 EFI_ECU, 1300 Battery ECU, 2000 Secondary battery, 2100 Voltage drop prevention mechanism, 3000 Motor generator, 3100 Inverter, 3200 Starter motor, 3010 Alternator rotor, 3020 Alternator stator, 3030 Pulley, 3102 Inverter circuit, 3104 Thermistor, 3106 Regulator IC, 3108 Field abnormality detector And a lock determination unit, 3110 control unit, 3112 protection circuit.

Claims (6)

A rotating electrical machine mounted on a vehicle equipped with an idling stop system that temporarily stops an engine when a vehicle condition satisfies a predetermined condition, wherein the rotating electrical machine stops the engine after the temporary stop. Having a function of restarting or generating power during regenerative braking of the vehicle,
The rotating electric machine is
A drive circuit for driving the rotating electrical machine;
Detection means for detecting an abnormality in the rotating electrical machine or the drive circuit;
In order to execute a plurality of abnormality processes corresponding to the types of abnormality detected by the detection means and to control a plurality of signals corresponding to the plurality of abnormality processes to be distinguished and output using one output terminal A rotating electric machine with a drive circuit mounted on a vehicle. The control means performs control so as to distinguish and output the prohibition command for the idling stop system and the prohibition command for the power generation function in the vehicle corresponding to the detected abnormality type using the one output terminal. The rotating electrical machine with a drive circuit according to claim 1, comprising means for the above. The detection means includes means for detecting an abnormality based on the temperature of the electric element of the drive circuit,
The rotating electrical machine with a drive circuit according to claim 2, wherein the control means further includes a determination means for determining the prohibition command based on the detected temperature of the electric element. The rotating electrical machine with a drive circuit according to claim 3, wherein the determination unit includes a unit for determining the prohibition command based on a temperature of a cooling fin that cools the power element as the electric element. The rotating electrical machine with a drive circuit according to claim 1, wherein the rotating electrical machine is a motor generator, and the drive circuit is an inverter circuit. 6. The rotating electrical machine with a drive circuit according to claim 5, wherein the armature and the rotor of the motor generator are parts of an alternator, and the inverter circuit is an air-cooled inverter circuit.

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