US20010002782A1 - Control apparatus for electric vehicle - Google Patents
Control apparatus for electric vehicle Download PDFInfo
- Publication number
- US20010002782A1 US20010002782A1 US09/729,702 US72970200A US2001002782A1 US 20010002782 A1 US20010002782 A1 US 20010002782A1 US 72970200 A US72970200 A US 72970200A US 2001002782 A1 US2001002782 A1 US 2001002782A1
- Authority
- US
- United States
- Prior art keywords
- gate
- voltage
- igbt
- resistance
- elements
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/51—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells characterised by AC-motors
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/04—Modifications for accelerating switching
- H03K17/042—Modifications for accelerating switching by feedback from the output circuit to the control circuit
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/92—Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles
Definitions
- the present invention relates to an inverter for a motor for driving an electric vehicle, and particularly relates to an input resistance control system of power elements (such as IGBT (Isolated Gate Bipolar Transistors)) for the purpose of reducing switching loss of the electric power elements
- IGBT Insulated Gate Bipolar Transistors
- a motor e.g. a synchronous motor
- a motor composed of a rotor having a plurality of pairs of poles and a stator constituted by a three-phase winding
- a predetermined driving force is obtained by supplying an alternating current power generated by an inverter based on a predetermined command current to the three-phase winding of a stator.
- the above-described inverter is formed, as shown in FIG. 10, by connecting, using a three arm bridge, six power elements (such as IGBT elements, insulating gates, and bipolar transistors, and hereinafter, the power elements are assumed to be IGBT elements), and the alternating current power for driving the motor is obtained from the direct current source connected to current carrying devices by controlling the current carrying devices by gate controlling and switching these power elements.
- six power elements such as IGBT elements, insulating gates, and bipolar transistors, and hereinafter, the power elements are assumed to be IGBT elements
- the first method is to turn OFF the IGBT element 4 while maintaining the IGBT element 1 ON, as shown in FIG. 11, in the case of stopping a current i 1 which flows in the motor winding, as shown in FIG. 10, by supplying the current i 1 through the positive side IGBT element 1 connected to one arm and the negative side IGBT element 4 connected to the other arm.
- the current flowing in the motor constituting an inductive load flows to the diode portion by passing the IGBT element 1 and IGBT element 3 through a current route i 11 , and the above IGBT element 1 is turned OFF after the current i 11 has been attenuated.
- the second method for driving the gate is, as shown in FIG. 12, a driving method to turn OFF the IGBT element 1 and IGBT element 4 simultaneously.
- the current i 1 shown in FIG. 10
- flowing in the motor M is fed back as a current i 12 passing through the diode portion of the IGBT element 2 and the diode portion of the IGBT 3 , the current i 12 disappears within a comparatively short period of time.
- the switching speed is delayed by blunting the rise and fall of the signal voltage applied to the gate using a parasitic capacitance originated between the gate and emitter of the IGBT element and the input resistance, which is attached in series to the gate of the IGBT element, in order to prevent breakdown of the elements by a surge voltage.
- a control apparatus for an electric vehicle which controls a traveling electric vehicle by supplying an electric power to a motor for driving the vehicle through an inverter comprising an input resistance value setting device for setting the resistance value of an input resistor to a plurality of electric power elements in said inverter in response to the driving state of the vehicle.
- the input resistance value setting device sets said resistance value in response to any one of said battery voltage, the temperature of said electric power elements, or the power consumption of said power elements.
- FIG. 1 is a block diagram showing the structure of an inverter controlling apparatus for controlling the motor having a gate resistance control portion for moving the electric vehicle according to the first embodiment of the present invention.
- FIG. 2 is a diagram showing the structure of the gate resistance of a IGBT.
- FIG. 3 is a diagram showing the relationship between the gate resistance, the surge voltage, and the switching loss.
- FIG. 4 is a diagram explaining the relationship between the IGBT temperature and the surge voltage.
- FIG. 5 is a flow-chart showing a procedure for the motor control using the control apparatus of the electric vehicle according to the first embodiment of the present invention.
- FIG. 6 is a diagram showing the relationship between the IGBT temperature, a desirable gate resistance, and the allowable surge withstand voltage.
- FIG. 7 is a diagram showing the relationship between the command current, the desirable gate resistance, and the allowable surge withstand voltage.
- FIG. 8 is a diagram showing the relationship between the battery voltage, the desirable gate resistance, and the allowable surge withstand voltage.
- FIG. 9 is a diagram explaining the gate resistance control of the IGBT according to the second embodiment of the present invention.
- FIG. 10 is a diagram showing the current path when the three-phase bridge inverter using IGBT elements is in the current conducting state .
- FIG. 11 is a diagram showing the motor current path when the IGBT elements in the current conducting state shown in FIG. 10 are turned OFF in sequence to a predetermined time difference.
- FIG. 12 is a diagram showing the motor current path when the IGBT elements in the current conducting state shown in FIG. 10 are turned OFF.
- the first embodiment shows an example in which an IGBT element is used as the electric power element.
- FIG. 1 is a block diagram showing the structure of an inverter controlling apparatus for controlling the motor having a gate resistance control portion for driving the electric vehicle according to the first embodiment of the present invention.
- the symbol ECU represents the gate control device, which comprises a command current value output device 8 for outputting a command current value in response to an output of the accelerator opening detecting device 31 , the IGBT gate switching portion 32 , and a gate resistance control portion 10 , both of which are controlled by the output of the command current value output device 8 , and the gate resistor Rg of IGBT blocks 21 to 26 are controlled by the output of the gate resistance control portion 10 .
- the IGBT blocks 21 to 26 are connected to IGBTs 1 to 6 through a gate resistor Rg, and switching operations of the IGBTs 1 to 6 are executed when the control signal from the gate control device ECU is applied to the gate resistor Rg.
- FIG. 1 shows only one IGBT 1 , practically six IGBTs 1 - 6 are provided for forming an inverter, similar to FIG. 10 and IGBTs 2 to 6 are omitted.
- the gate resistance control portion 10 comprises a gate resistance calculation device 12 and a gate resistance control portion 13 .
- the gate resistance calculation device 12 receives a control signal from the IGBT temperature detection device 11 , a detection signal from a direct current voltage detection device 7 , control signals from the command current value output device 18 and IGBT gate switching portion 32 , and the minimum value of the gate resistance, which can be set, is calculated depending upon the correlation between the gate resistance and the environmental conditions, which are described later.
- the result of the calculation executed by the gate resistance calculation device 12 is delivered to the gate resistance control portion 13 , and the sharpness of the rise and fall of the signal voltage applied to the gate of the IGBT 1 is controlled by the overall effect between the gate resistance obtained by switching the resistor Rg and the stray capacitance of the gate and emitter of the IGBT 1 .
- FIG. 2 is a diagram showing the structure of the gate resistor Rg. The switching operation of the gate resistor Rg is explained with reference to FIG. 2.
- the gate resistor Rg comprises a resistor 71 and two other resistors 72 and 74 , which are selectively connected in parallel with the resistor 71 , and two transistors 73 and 75 for connecting or disconnecting the resistors 72 and 74 , respectively.
- a signal from the gate resistance control device 13 activates the transistors 73 and/or 75 for connecting in parallel or disconnecting the resistor 72 and/or 74 to the resistor 71 .
- FIG. 4 is a diagram showing the relationship between the temperature of the IGBT and the surge voltage.
- the uppermost line shows the allowable surge withstand voltage of the IGBT, which indicates that the allowable surge withstand voltage increases as the temperature of the IGBT increases.
- margin voltage As shown in FIG. 4, in the high temperature region, a considerable discrepancy hereinafter called a margin voltage) is present between the allowable surge withstand voltage of the IGBT and the generated surge voltage, thus, if the resistance of the gate resistor is maintained at a low value, the rise and fall of the signal voltage to be applied to the gate become sharp. Accordingly, it is possible to reduce the switching loss by permitting the generation of a high surge voltage up to the level of the allowable surge withstand voltage.
- FIG. 5 is a flow-chart showing a process for controlling a motor.
- the command current value is determined in step S 1 and the signal is generated from the command current value output device 8 .
- step S 2 an IGBT element temperature- detecting device 11 detects the temperature of the IGBT and the battery voltage is detected by a direct current voltage detecting device 7 .
- step S 3 an optimum gate resistance is calculated in a gate resistance calculation device 12 in response to the temperature, the voltage, and the current obtained in step S 1 and S 2 .
- step S 4 the gate resistor Rg is switched by a gate resistance control device 13 . This switching is executed in order to switch the gate resistor Rg into a resistance, which is larger than and close to the above-described optimum gate resistance.
- step S 5 the IGBT gate control device ECU drives the motor by switching the IGBTs in response to the command current.
- FIG. 6 is a diagram showing the relationship between the temperature of the IGBT and the allowable surge withstand voltage and the relationship between the temperature of the IGBT element and the gate resistance, that restricts the generation of a surge voltage at a predetermined voltage below the allowable surge withstand voltage.
- the switching loss can be minimized by increasing the resistance of the gate resistor with the increase of the temperature in a region where the temperature is comparatively low, and by reducing the resistance of the gate resistor with the increase of the temperature in the high temperature region.
- the margin voltage is defined by the difference between the above-described allowable surge withstand voltage and the above-described predetermined voltage.
- FIG. 7 is a diagram showing the relationship between the command current value and the allowable surge withstand voltage and the relationship between the command current value and the gate resistance, that restricts the generating surge voltage to a predetermined value below the allowable surge withstand voltage.
- the allowable surge withstand voltage tends to decrease with the increase of the command current value, it is necessary to increase the resistance of the gate resistor with the increase of the command current value, in order to restrict the generating surge voltage to a predetermined voltage below the allowable surge withstand voltage.
- the margin voltage is defined by the difference between the above-described allowable surge withstand voltage and the above-described predetermined voltage.
- FIG. 8 is a diagram showing the relationship between the battery voltage and the allowable surge withstand voltage and the relationship between the battery voltage and the gate resistance that restricts the generating surge voltage to a predetermined voltage below the allowable surge withstand voltage.
- the allowable surge withstand voltage tends to decrease with the increase of the battery voltage, it is necessary to increase the gate resistance of the gate resistor with the increase of the battery voltage in order to restrict the generating surge voltage to a predetermined voltage below the allowable surge withstand voltage.
- the margin voltage is defined by the difference between the above-described allowable surge withstand voltage and the above-described predetermined voltage.
- the generating surge voltage can be restricted to a predetermined value below the allowable surge withstand voltage and the switching loss can be minimized.
- FIG. 9 is a diagram explaining the gate resistance control of the IGBT elements according to the second embodiment of the present invention.
- the gate resistor Rg is formed by connecting in parallel a fixed resistor 81 and a component, formed by connecting a fixed resistor 82 and a thermistor 83 in series, and a control signal for the gate control device ECU is applied to the gate of the IGBT element through the gate resistor Rg.
- the second embodiment neither includes the gate resistance calculation device nor the gate resistance control device, since the resistance of the gate resistor changes depending on the temperature of the IGBT element, and is not controlled by a computer in this embodiment.
- the resistance of the thermistor 82 has a large negative temperature coefficient, so that the composite resistance of the above gate resistor Rg decreases with the increase of the temperature of the IGBT.
- the switching loss can be reduced by selecting appropriate elements for constituting the gate resistor such that the generating surge voltage is restricted to a predetermined value below the allowable surge withstand voltage.
- the IGBT element has been described as an example of the electric power element, but other elements such as FETs or bipolar transistors may be used for the electric power elements.
- the gate resistance control is carried out in common for the gate resistor comprising a plurality of IGBT elements, it is possible to provide a gate resistance control device for each IGBT element.
- the number of the resistors connected in parallel for forming the gate resistor is not limited to the above embodiments.
- the gate resistor can be formed by connecting resistors in series.
- the resistor having a high temperature coefficient is not limited to a thermistor and other elements can be used for forming the gate resistor.
- the present invention has the effect that since the present control apparatus for electric vehicles controls the resistance of the input resistor to be as low as possible so as to restrict the generating surge voltage to a predetermined value below the allowable surge withstand voltage, the switching loss can be reduced to a minimum while the generating surge voltage is restricted to within a safe region.
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Inverter Devices (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Power Conversion In General (AREA)
Abstract
Description
- 1. Field of the Invention
- The present invention relates to an inverter for a motor for driving an electric vehicle, and particularly relates to an input resistance control system of power elements (such as IGBT (Isolated Gate Bipolar Transistors)) for the purpose of reducing switching loss of the electric power elements
- 2. Background Art
- In general, a motor (e.g. a synchronous motor) composed of a rotor having a plurality of pairs of poles and a stator constituted by a three-phase winding is used for driving, electric vehicles and a predetermined driving force is obtained by supplying an alternating current power generated by an inverter based on a predetermined command current to the three-phase winding of a stator.
- The above-described inverter is formed, as shown in FIG. 10, by connecting, using a three arm bridge, six power elements (such as IGBT elements, insulating gates, and bipolar transistors, and hereinafter, the power elements are assumed to be IGBT elements), and the alternating current power for driving the motor is obtained from the direct current source connected to current carrying devices by controlling the current carrying devices by gate controlling and switching these power elements.
- Inputting a predetermined driving pulse to the gate of the IGBT elements carries out switching of IGBT elements.
- There are two methods for driving the gate. The first method is to turn OFF the
IGBT element 4 while maintaining theIGBT element 1 ON, as shown in FIG. 11, in the case of stopping a current i1 which flows in the motor winding, as shown in FIG. 10, by supplying the current i1 through the positiveside IGBT element 1 connected to one arm and the negativeside IGBT element 4 connected to the other arm. At this time, the current flowing in the motor constituting an inductive load flows to the diode portion by passing theIGBT element 1 andIGBT element 3 through a current route i11, and theabove IGBT element 1 is turned OFF after the current i11 has been attenuated. - The second method for driving the gate is, as shown in FIG. 12, a driving method to turn OFF the
IGBT element 1 andIGBT element 4 simultaneously. At this time, since the current i1, shown in FIG. 10, flowing in the motor M is fed back as a current i12 passing through the diode portion of theIGBT element 2 and the diode portion of theIGBT 3, the current i12 disappears within a comparatively short period of time. - However, when the gate is driven as described above, the switching speed is delayed by blunting the rise and fall of the signal voltage applied to the gate using a parasitic capacitance originated between the gate and emitter of the IGBT element and the input resistance, which is attached in series to the gate of the IGBT element, in order to prevent breakdown of the elements by a surge voltage.
- When the switching speed is reduced, the problem arises that the delayed switching generates heat in the IGBT element due to the switching loss, and the generated heat causes thermal breakdown of the elements and, in contrast, requires a large cooling device. The problem also arises because the increase of the heat loss and the large cooling system consumes the electric power of the battery, which results in reducing the traveling distance of the vehicle.
- It is therefore an object of the present invention to provide a control apparatus for electric vehicles, which is capable of reducing the switching loss while restricting the surge voltage to a safe withstand voltage below an allowable surge withstand voltage by controlling the resistance of an input resistance depending on the traveling state of the electric vehicle.
- According to the first aspect of the present invention, a control apparatus for an electric vehicle is provided, which controls a traveling electric vehicle by supplying an electric power to a motor for driving the vehicle through an inverter comprising an input resistance value setting device for setting the resistance value of an input resistor to a plurality of electric power elements in said inverter in response to the driving state of the vehicle.
- In the control apparatus for an electric vehicle according to the first aspect, the input resistance value setting device sets said resistance value in response to any one of said battery voltage, the temperature of said electric power elements, or the power consumption of said power elements.
- FIG. 1 is a block diagram showing the structure of an inverter controlling apparatus for controlling the motor having a gate resistance control portion for moving the electric vehicle according to the first embodiment of the present invention.
- FIG. 2 is a diagram showing the structure of the gate resistance of a IGBT.
- FIG. 3 is a diagram showing the relationship between the gate resistance, the surge voltage, and the switching loss.
- FIG. 4 is a diagram explaining the relationship between the IGBT temperature and the surge voltage.
- FIG. 5 is a flow-chart showing a procedure for the motor control using the control apparatus of the electric vehicle according to the first embodiment of the present invention.
- FIG. 6 is a diagram showing the relationship between the IGBT temperature, a desirable gate resistance, and the allowable surge withstand voltage.
- FIG. 7 is a diagram showing the relationship between the command current, the desirable gate resistance, and the allowable surge withstand voltage.
- FIG. 8 is a diagram showing the relationship between the battery voltage, the desirable gate resistance, and the allowable surge withstand voltage.
- FIG. 9 is a diagram explaining the gate resistance control of the IGBT according to the second embodiment of the present invention.
- FIG. 10 is a diagram showing the current path when the three-phase bridge inverter using IGBT elements is in the current conducting state .
- FIG. 11 is a diagram showing the motor current path when the IGBT elements in the current conducting state shown in FIG. 10 are turned OFF in sequence to a predetermined time difference.
- FIG. 12 is a diagram showing the motor current path when the IGBT elements in the current conducting state shown in FIG. 10 are turned OFF.
- Hereinafter, the first embodiment of the present invention is described in detail with reference to the attached drawings. The first embodiment shows an example in which an IGBT element is used as the electric power element.
- FIG. 1 is a block diagram showing the structure of an inverter controlling apparatus for controlling the motor having a gate resistance control portion for driving the electric vehicle according to the first embodiment of the present invention.
- In FIG. 1, the symbol ECU represents the gate control device, which comprises a command current
value output device 8 for outputting a command current value in response to an output of the acceleratoropening detecting device 31, the IGBTgate switching portion 32, and a gate resistance control portion 10, both of which are controlled by the output of the command currentvalue output device 8, and the gate resistor Rg ofIGBT blocks 21 to 26 are controlled by the output of the gate resistance control portion 10. - The
IGBT blocks 21 to 26 are connected toIGBTs 1 to 6 through a gate resistor Rg, and switching operations of theIGBTs 1 to 6 are executed when the control signal from the gate control device ECU is applied to the gate resistor Rg. - It is noted that, although FIG. 1 shows only one
IGBT 1, practically six IGBTs 1-6 are provided for forming an inverter, similar to FIG. 10 andIGBTs 2 to 6 are omitted. - Below, the operations of the gate resistance control portion10 and the
IGBT block 21 are described. - The gate resistance control portion10 comprises a gate
resistance calculation device 12 and a gateresistance control portion 13. - The gate
resistance calculation device 12 receives a control signal from the IGBT temperature detection device 11, a detection signal from a direct currentvoltage detection device 7, control signals from the command current value output device 18 and IGBTgate switching portion 32, and the minimum value of the gate resistance, which can be set, is calculated depending upon the correlation between the gate resistance and the environmental conditions, which are described later. - The result of the calculation executed by the gate
resistance calculation device 12 is delivered to the gateresistance control portion 13, and the sharpness of the rise and fall of the signal voltage applied to the gate of theIGBT 1 is controlled by the overall effect between the gate resistance obtained by switching the resistor Rg and the stray capacitance of the gate and emitter of theIGBT 1. - FIG. 2 is a diagram showing the structure of the gate resistor Rg. The switching operation of the gate resistor Rg is explained with reference to FIG. 2.
- The gate resistor Rg comprises a
resistor 71 and twoother resistors resistor 71, and twotransistors resistors - A signal from the gate
resistance control device 13 activates thetransistors 73 and/or 75 for connecting in parallel or disconnecting theresistor 72 and/or 74 to theresistor 71. - Next, the relationship between the resistance of the gate resistor Rg of the IGBT and the surge voltage or the switching loss is described with reference to FIG. 3. As seen in FIG. 3, the switching loss decreases as the resistance of the gate resistor decreases, but the surge voltage increases. In contrast, when the resistance of the gate resistor increases, the surge voltage increases but the switching loss increases.
- This is because the sharpness of the rise and fall of the signal voltage applied to the gate decreases by the effect of the parasitic capacitance between the gate and the emitter of the IGBT when the resistance of the gate resistor is large.
- If the rise and fall of the signal voltage applied to the gate of the IGBT are sharp, the value of the derivative (di/dt) becomes large, and the surge voltage L·(di/dt), which is generated by the stray inductance L of the wiring bus bar, also becomes large.
- In contrast, when the rise and fall of the signal voltage applied to the gate of the IGBT is not sharp, although the value of the surge voltage·(di/dt) becomes small, the time required for switching becomes long, and the switching loss increases because of the timing for the flow of the current in the state that the IGBT is not saturated.
- FIG. 4 is a diagram showing the relationship between the temperature of the IGBT and the surge voltage. The uppermost line shows the allowable surge withstand voltage of the IGBT, which indicates that the allowable surge withstand voltage increases as the temperature of the IGBT increases.
- On the other hand, as shown by the lowermost line of FIG. 4, when the resistance of the gate resistor is fixed, the generating surge voltage increases with the increase of the temperature of the IGBT in the low temperature region. However, in the high temperature region, the generated surge voltage decreases with the increase of the temperature.
- As shown in FIG. 4, in the high temperature region, a considerable discrepancy hereinafter called a margin voltage) is present between the allowable surge withstand voltage of the IGBT and the generated surge voltage, thus, if the resistance of the gate resistor is maintained at a low value, the rise and fall of the signal voltage to be applied to the gate become sharp. Accordingly, it is possible to reduce the switching loss by permitting the generation of a high surge voltage up to the level of the allowable surge withstand voltage.
- FIG. 5 is a flow-chart showing a process for controlling a motor. In FIG. 5, the command current value is determined in step S1 and the signal is generated from the command current
value output device 8. - In step S2, an IGBT element temperature- detecting device 11 detects the temperature of the IGBT and the battery voltage is detected by a direct current
voltage detecting device 7. - In step S3, an optimum gate resistance is calculated in a gate
resistance calculation device 12 in response to the temperature, the voltage, and the current obtained in step S1 and S2. - In step S4, the gate resistor Rg is switched by a gate
resistance control device 13. This switching is executed in order to switch the gate resistor Rg into a resistance, which is larger than and close to the above-described optimum gate resistance. - In step S5, the IGBT gate control device ECU drives the motor by switching the IGBTs in response to the command current.
- Next, the technical basis for calculating the gate resistance is described below with reference to FIGS.6 to 8.
- FIG. 6 is a diagram showing the relationship between the temperature of the IGBT and the allowable surge withstand voltage and the relationship between the temperature of the IGBT element and the gate resistance, that restricts the generation of a surge voltage at a predetermined voltage below the allowable surge withstand voltage.
- As shown in FIG. 6, the switching loss can be minimized by increasing the resistance of the gate resistor with the increase of the temperature in a region where the temperature is comparatively low, and by reducing the resistance of the gate resistor with the increase of the temperature in the high temperature region. Here, the margin voltage is defined by the difference between the above-described allowable surge withstand voltage and the above-described predetermined voltage.
- FIG. 7 is a diagram showing the relationship between the command current value and the allowable surge withstand voltage and the relationship between the command current value and the gate resistance, that restricts the generating surge voltage to a predetermined value below the allowable surge withstand voltage.
- As shown in FIG. 7, since the allowable surge withstand voltage tends to decrease with the increase of the command current value, it is necessary to increase the resistance of the gate resistor with the increase of the command current value, in order to restrict the generating surge voltage to a predetermined voltage below the allowable surge withstand voltage. Here, the margin voltage is defined by the difference between the above-described allowable surge withstand voltage and the above-described predetermined voltage.
- FIG. 8 is a diagram showing the relationship between the battery voltage and the allowable surge withstand voltage and the relationship between the battery voltage and the gate resistance that restricts the generating surge voltage to a predetermined voltage below the allowable surge withstand voltage.
- As shown in FIG. 8, since the allowable surge withstand voltage tends to decrease with the increase of the battery voltage, it is necessary to increase the gate resistance of the gate resistor with the increase of the battery voltage in order to restrict the generating surge voltage to a predetermined voltage below the allowable surge withstand voltage. Here, the margin voltage is defined by the difference between the above-described allowable surge withstand voltage and the above-described predetermined voltage.
- Accordingly, when the resistance of the gate resistor Rg is controlled to a minimum value that satisfies all of the environmental conditions by the gate
resistance calculation device 12, the generating surge voltage can be restricted to a predetermined value below the allowable surge withstand voltage and the switching loss can be minimized. - Next, the second embodiment of the present invention is explained below.
- FIG. 9 is a diagram explaining the gate resistance control of the IGBT elements according to the second embodiment of the present invention. As shown in FIG. 9, the gate resistor Rg is formed by connecting in parallel a
fixed resistor 81 and a component, formed by connecting a fixedresistor 82 and athermistor 83 in series, and a control signal for the gate control device ECU is applied to the gate of the IGBT element through the gate resistor Rg. - It is noted, however, that the second embodiment neither includes the gate resistance calculation device nor the gate resistance control device, since the resistance of the gate resistor changes depending on the temperature of the IGBT element, and is not controlled by a computer in this embodiment.
- The resistance of the
thermistor 82 has a large negative temperature coefficient, so that the composite resistance of the above gate resistor Rg decreases with the increase of the temperature of the IGBT. - Accordingly, the switching loss can be reduced by selecting appropriate elements for constituting the gate resistor such that the generating surge voltage is restricted to a predetermined value below the allowable surge withstand voltage.
- The operation of the preferred embodiments of the present invention has been described with reference to the attached drawings, but the variants thereof can be envisaged which do not exceed the scope of the present invention.
- For example, the IGBT element has been described as an example of the electric power element, but other elements such as FETs or bipolar transistors may be used for the electric power elements.
- Furthermore, in the above embodiments, although an example is shown in which the gate resistance control is carried out in common for the gate resistor comprising a plurality of IGBT elements, it is possible to provide a gate resistance control device for each IGBT element.
- It is also noted that the number of the resistors connected in parallel for forming the gate resistor is not limited to the above embodiments.
- The gate resistor can be formed by connecting resistors in series.
- Furthermore, the resistor having a high temperature coefficient is not limited to a thermistor and other elements can be used for forming the gate resistor.
- As described above, the present invention has the effect that since the present control apparatus for electric vehicles controls the resistance of the input resistor to be as low as possible so as to restrict the generating surge voltage to a predetermined value below the allowable surge withstand voltage, the switching loss can be reduced to a minimum while the generating surge voltage is restricted to within a safe region.
Claims (4)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11-348189 | 1999-12-07 | ||
JPPATENT11-348189 | 1999-12-07 | ||
JP34818999A JP3983439B2 (en) | 1999-12-07 | 1999-12-07 | Electric vehicle control device |
Publications (2)
Publication Number | Publication Date |
---|---|
US20010002782A1 true US20010002782A1 (en) | 2001-06-07 |
US6384552B2 US6384552B2 (en) | 2002-05-07 |
Family
ID=18395353
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/729,702 Expired - Fee Related US6384552B2 (en) | 1999-12-07 | 2000-12-06 | Control apparatus for electric vehicle |
Country Status (2)
Country | Link |
---|---|
US (1) | US6384552B2 (en) |
JP (1) | JP3983439B2 (en) |
Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040004502A1 (en) * | 2002-07-05 | 2004-01-08 | Mitsubishi Denki Kabushiki Kaisha | Semiconductor module |
WO2006070266A2 (en) * | 2004-12-28 | 2006-07-06 | Toyota Jidosha Kabushiki Kaisha | Motor control unit and vehicle equipped therewith |
US20090237052A1 (en) * | 2008-03-21 | 2009-09-24 | Denso Corporation | Control apparatus for controlling power conversion apparatus |
US20100320951A1 (en) * | 2007-12-14 | 2010-12-23 | Kabushiki Kaisha Toshiba | Inverter device, electric automobile in which the inverter device is mounted, and hybrid automobile in which the inverter device is mounted |
US20110007536A1 (en) * | 2008-03-18 | 2011-01-13 | Toyota Jidosha Kabushiki Kaisha | Device for driving inverter |
WO2012069053A3 (en) * | 2010-11-25 | 2013-01-17 | Danfoss Power Electronics A/S | Apparatus and method for controlling a motor and generating thermal energy |
DE102013212262A1 (en) | 2012-06-27 | 2014-01-02 | Denso Corporation | POWER CONVERTER |
WO2015104174A1 (en) * | 2014-01-09 | 2015-07-16 | Robert Bosch Gmbh | Method for operating an active rectifier, a circuit arrangement, and a computer program |
US20150364468A1 (en) * | 2014-06-16 | 2015-12-17 | Infineon Technologies Ag | Discrete Semiconductor Transistor |
WO2016091429A1 (en) * | 2014-12-12 | 2016-06-16 | Robert Bosch Gmbh | Method and device for operating a switching element |
WO2017093080A1 (en) * | 2015-11-30 | 2017-06-08 | Robert Bosch Gmbh | Method for the operating point-related controlling of the switching rate in an inverter |
EP3089346A4 (en) * | 2013-12-27 | 2017-08-23 | Hitachi Industrial Equipment Systems Co., Ltd. | Power conversion device and power conversion device control method |
WO2018050732A1 (en) * | 2016-09-14 | 2018-03-22 | Valeo Siemens Eautomotive Germany Gmbh | Method for operating a current converter and current converter operating according to said method |
FR3066056A1 (en) * | 2017-05-05 | 2018-11-09 | Centre National De La Recherche Scientifique | DEVICE FOR LIMITING THE APPEARANCE OF PARTIAL DISCHARGES ON EQUIPMENT GENERATING AN ELECTRICAL VOLTAGE, AND ASSOCIATED METHOD. |
CN110784119A (en) * | 2018-07-12 | 2020-02-11 | Lg电子株式会社 | Power conversion device, compressor comprising same and control method thereof |
DE102019125732A1 (en) * | 2019-09-25 | 2021-03-25 | Schaeffler Technologies AG & Co. KG | Control and / or regulating unit and method for operating an electric drive unit and driver circuit for such a control and / or regulating unit |
US11025245B2 (en) | 2017-08-24 | 2021-06-01 | Mitsubishi Electric Corporation | Power conversion device |
EP3751738A4 (en) * | 2018-03-29 | 2021-10-27 | Daikin Industries, Ltd. | Semiconductor device |
DE102021111770A1 (en) | 2021-05-06 | 2022-11-10 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Method for controlling an electrical machine and electrically or partially electrically driven vehicle for carrying out the method |
DE102022200868A1 (en) | 2022-01-26 | 2023-07-27 | Zf Friedrichshafen Ag | Control of a flow valve |
EP4207602A4 (en) * | 2020-08-28 | 2023-10-18 | Nissan Motor Co., Ltd. | Switching element drive method and switching element drive device |
Families Citing this family (30)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3540209B2 (en) * | 1999-08-25 | 2004-07-07 | 本田技研工業株式会社 | Hybrid vehicle control device |
JP4044861B2 (en) * | 2003-04-03 | 2008-02-06 | 三菱電機株式会社 | Power conversion device and power conversion system device including the power conversion device |
JP2005020919A (en) * | 2003-06-27 | 2005-01-20 | Toyota Industries Corp | Controller for electric motor |
JP4364651B2 (en) * | 2004-01-07 | 2009-11-18 | 三菱電機株式会社 | Booster and motor controller |
JP2005253183A (en) * | 2004-03-03 | 2005-09-15 | Mitsubishi Electric Corp | Power converter for vehicle |
JP4802499B2 (en) * | 2005-01-07 | 2011-10-26 | トヨタ自動車株式会社 | Power control circuit and vehicle |
JP4583998B2 (en) * | 2005-04-04 | 2010-11-17 | トヨタ自動車株式会社 | Control device for moving body |
JP4462243B2 (en) | 2006-07-10 | 2010-05-12 | トヨタ自動車株式会社 | Load driving device and vehicle equipped with the same |
JP4678374B2 (en) * | 2007-01-04 | 2011-04-27 | トヨタ自動車株式会社 | LOAD DEVICE CONTROL DEVICE AND VEHICLE |
JP2008178175A (en) * | 2007-01-17 | 2008-07-31 | Diamond Electric Mfg Co Ltd | Control motor driver |
JP4349447B2 (en) * | 2007-07-19 | 2009-10-21 | トヨタ自動車株式会社 | Inverter control device and vehicle |
JP2009296721A (en) * | 2008-06-03 | 2009-12-17 | Denso Corp | Voltage boosting power supply and drive device |
JP5341557B2 (en) * | 2009-03-02 | 2013-11-13 | 株式会社日本自動車部品総合研究所 | Inverter device |
JP2010252451A (en) * | 2009-04-13 | 2010-11-04 | Fuji Electric Systems Co Ltd | Switching element drive circuit of power converter |
JP5317881B2 (en) * | 2009-08-05 | 2013-10-16 | 三菱電機株式会社 | Power converter and protection method for power converter |
JP2011250603A (en) * | 2010-05-27 | 2011-12-08 | Jtekt Corp | Motor controller and electric power steering device |
JP5633442B2 (en) * | 2011-03-18 | 2014-12-03 | 三菱電機株式会社 | Inverter control device and refrigeration air conditioner |
JP2013005067A (en) * | 2011-06-14 | 2013-01-07 | Hitachi Automotive Systems Ltd | Power conversion apparatus |
JP5267644B2 (en) * | 2011-11-30 | 2013-08-21 | トヨタ自動車株式会社 | Power supply device, power supply method, and motor drive system |
JP2013141409A (en) * | 2013-04-23 | 2013-07-18 | Fuji Electric Co Ltd | Switching element drive circuit for electric power conversion system |
US10491095B2 (en) | 2014-10-06 | 2019-11-26 | Ford Global Technologies, Llc | Dynamic IGBT gate drive for vehicle traction inverters |
US10122357B2 (en) * | 2016-11-14 | 2018-11-06 | Ford Global Technologies, Llc | Sensorless temperature compensation for power switching devices |
JP6961944B2 (en) * | 2017-01-18 | 2021-11-05 | 富士電機株式会社 | Power semiconductor module |
JP6965817B2 (en) * | 2018-04-13 | 2021-11-10 | 株式会社豊田自動織機 | In-vehicle DC-AC inverter |
JP6941280B2 (en) * | 2018-06-26 | 2021-09-29 | 株式会社オートネットワーク技術研究所 | In-vehicle temperature detection circuit |
JP6935375B2 (en) | 2018-09-04 | 2021-09-15 | 株式会社東芝 | Switching devices, power converters, controls and programs |
JP6993949B2 (en) * | 2018-09-13 | 2022-01-14 | 株式会社東芝 | Electronic circuits and methods |
JP6926131B2 (en) | 2019-01-04 | 2021-08-25 | 株式会社東芝 | Gate resistance adjustment device, power supply device, gate resistance design device and gate resistance design method |
US20230327577A1 (en) | 2020-08-25 | 2023-10-12 | Sanden Corporation | Inverter device, and vehicular electric compressor provided with same |
CN117178465A (en) * | 2021-05-21 | 2023-12-05 | 日立安斯泰莫株式会社 | Gate drive circuit and power conversion device |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3693067A (en) * | 1970-08-07 | 1972-09-19 | Leeds & Northrup Co | Adjustable proportional response for balanceable system |
US3941198A (en) * | 1974-08-29 | 1976-03-02 | Kappas Chris S | Detachable power unit for a golf bag cart |
JPS51104794A (en) * | 1975-02-14 | 1976-09-16 | Outboard Marine Corp | |
US4152569A (en) * | 1977-05-13 | 1979-05-01 | Colt Industries Operating Corp. | Servo feed circuit for electrical discharge machining apparatus |
US4804902A (en) * | 1987-05-19 | 1989-02-14 | Hewlett-Packard Company | Linear, low EMI/RFE fan control circuit |
US5216345A (en) * | 1992-05-04 | 1993-06-01 | Hughes Aircraft Company | Mixed mode stepper motor controller and method |
DE29902571U1 (en) * | 1998-05-19 | 2000-03-23 | Papst Motoren Gmbh & Co Kg | Electronically commutated motor |
-
1999
- 1999-12-07 JP JP34818999A patent/JP3983439B2/en not_active Expired - Fee Related
-
2000
- 2000-12-06 US US09/729,702 patent/US6384552B2/en not_active Expired - Fee Related
Cited By (38)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2842045A1 (en) * | 2002-07-05 | 2004-01-09 | Mitsubishi Electric Corp | SEMICONDUCTOR MODULE COMPRISING A SEMICONDUCTOR SWITCHING DEVICE |
US7006933B2 (en) | 2002-07-05 | 2006-02-28 | Mitsubishi Denki Kabushiki Kaisha | Semiconductor module for outputting power loss |
US20040004502A1 (en) * | 2002-07-05 | 2004-01-08 | Mitsubishi Denki Kabushiki Kaisha | Semiconductor module |
WO2006070266A2 (en) * | 2004-12-28 | 2006-07-06 | Toyota Jidosha Kabushiki Kaisha | Motor control unit and vehicle equipped therewith |
WO2006070266A3 (en) * | 2004-12-28 | 2006-08-31 | Toyota Motor Co Ltd | Motor control unit and vehicle equipped therewith |
US20070290650A1 (en) * | 2004-12-28 | 2007-12-20 | Koichiro Muta | Motor Control Unit And Vehicle Equipped Therewith |
US7663329B2 (en) | 2004-12-28 | 2010-02-16 | Toyota Jidosha Kabushiki Kaisha | Motor control unit and vehicle equipped therewith |
US8354813B2 (en) * | 2007-12-14 | 2013-01-15 | Kabushiki Kaisha Toshiba | Inverter device, electric automobile in which the inverter device is mounted, and hybrid automobile in which the inverter device is mounted |
US20100320951A1 (en) * | 2007-12-14 | 2010-12-23 | Kabushiki Kaisha Toshiba | Inverter device, electric automobile in which the inverter device is mounted, and hybrid automobile in which the inverter device is mounted |
CN101978587A (en) * | 2008-03-18 | 2011-02-16 | 丰田自动车株式会社 | Device for driving inverter |
US20110007536A1 (en) * | 2008-03-18 | 2011-01-13 | Toyota Jidosha Kabushiki Kaisha | Device for driving inverter |
US8477518B2 (en) | 2008-03-18 | 2013-07-02 | Toyota Jidosha Kabushiki Kaisha | Device for driving inverter |
US8102687B2 (en) | 2008-03-21 | 2012-01-24 | Denso Corporation | Control apparatus for controlling power conversion apparatus |
US20090237052A1 (en) * | 2008-03-21 | 2009-09-24 | Denso Corporation | Control apparatus for controlling power conversion apparatus |
WO2012069053A3 (en) * | 2010-11-25 | 2013-01-17 | Danfoss Power Electronics A/S | Apparatus and method for controlling a motor and generating thermal energy |
DE102013212262A1 (en) | 2012-06-27 | 2014-01-02 | Denso Corporation | POWER CONVERTER |
US9143079B2 (en) | 2012-06-27 | 2015-09-22 | Denso Corporation | Power converter |
EP3089346A4 (en) * | 2013-12-27 | 2017-08-23 | Hitachi Industrial Equipment Systems Co., Ltd. | Power conversion device and power conversion device control method |
WO2015104174A1 (en) * | 2014-01-09 | 2015-07-16 | Robert Bosch Gmbh | Method for operating an active rectifier, a circuit arrangement, and a computer program |
US9893645B2 (en) | 2014-01-09 | 2018-02-13 | Seg Automotive Germany Gmbh | Method for operating an active rectifier, circuit system, and computer program for controlling a switching between modes of operation of an active rectifier |
US20150364468A1 (en) * | 2014-06-16 | 2015-12-17 | Infineon Technologies Ag | Discrete Semiconductor Transistor |
US9871126B2 (en) * | 2014-06-16 | 2018-01-16 | Infineon Technologies Ag | Discrete semiconductor transistor |
US10700677B2 (en) | 2014-12-12 | 2020-06-30 | Robert Bosch Gmbh | Method and device for operating a switching element |
WO2016091429A1 (en) * | 2014-12-12 | 2016-06-16 | Robert Bosch Gmbh | Method and device for operating a switching element |
CN107005235A (en) * | 2014-12-12 | 2017-08-01 | 罗伯特·博世有限公司 | Method and apparatus for run switch element |
WO2017093080A1 (en) * | 2015-11-30 | 2017-06-08 | Robert Bosch Gmbh | Method for the operating point-related controlling of the switching rate in an inverter |
WO2018050732A1 (en) * | 2016-09-14 | 2018-03-22 | Valeo Siemens Eautomotive Germany Gmbh | Method for operating a current converter and current converter operating according to said method |
US10715057B2 (en) | 2016-09-14 | 2020-07-14 | Valeo Siemens Eautomotive Germany Gmbh | Method for operating a current converter and current converter operating according to said method |
FR3066056A1 (en) * | 2017-05-05 | 2018-11-09 | Centre National De La Recherche Scientifique | DEVICE FOR LIMITING THE APPEARANCE OF PARTIAL DISCHARGES ON EQUIPMENT GENERATING AN ELECTRICAL VOLTAGE, AND ASSOCIATED METHOD. |
US11025245B2 (en) | 2017-08-24 | 2021-06-01 | Mitsubishi Electric Corporation | Power conversion device |
EP3751738A4 (en) * | 2018-03-29 | 2021-10-27 | Daikin Industries, Ltd. | Semiconductor device |
US11496084B2 (en) | 2018-03-29 | 2022-11-08 | Daikin Industries, Ltd. | Semiconductor device |
CN110784119A (en) * | 2018-07-12 | 2020-02-11 | Lg电子株式会社 | Power conversion device, compressor comprising same and control method thereof |
EP3595150A3 (en) * | 2018-07-12 | 2020-04-22 | Lg Electronics Inc. | Power converting device, compressor including the same, and control method thereof |
DE102019125732A1 (en) * | 2019-09-25 | 2021-03-25 | Schaeffler Technologies AG & Co. KG | Control and / or regulating unit and method for operating an electric drive unit and driver circuit for such a control and / or regulating unit |
EP4207602A4 (en) * | 2020-08-28 | 2023-10-18 | Nissan Motor Co., Ltd. | Switching element drive method and switching element drive device |
DE102021111770A1 (en) | 2021-05-06 | 2022-11-10 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Method for controlling an electrical machine and electrically or partially electrically driven vehicle for carrying out the method |
DE102022200868A1 (en) | 2022-01-26 | 2023-07-27 | Zf Friedrichshafen Ag | Control of a flow valve |
Also Published As
Publication number | Publication date |
---|---|
US6384552B2 (en) | 2002-05-07 |
JP3983439B2 (en) | 2007-09-26 |
JP2001169407A (en) | 2001-06-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6384552B2 (en) | Control apparatus for electric vehicle | |
US9166499B2 (en) | Electronic circuit operating based on isolated switching power source | |
US10491095B2 (en) | Dynamic IGBT gate drive for vehicle traction inverters | |
US10291168B2 (en) | Power conversion control apparatus | |
US20170302152A1 (en) | Driving circuit for switching element and power conversion system | |
US10090792B2 (en) | Self-balancing parallel power devices with a temperature compensated gate driver | |
US9837887B1 (en) | IGBT gate drive with active turnoff to reduce switching loss | |
US9350268B2 (en) | Control device for semiconductor switch on an inverter and method for the actuation of an inverter | |
US8723562B2 (en) | Drive unit for reverse-conducting switching element | |
EP2566034A1 (en) | Switching circuit | |
US10090832B2 (en) | Controller for power converter having a delaying unit | |
US8829836B2 (en) | Driver for switching element and control system for rotary machine using the same | |
CN101142737A (en) | Superheating detection mode of electric motor control device | |
JP2015065742A (en) | Inverter controller and control method for inverter device | |
CN102893524A (en) | Short-circuit protection method | |
JP6104660B2 (en) | Short-circuit current protection device | |
JP3052792B2 (en) | Inverter device | |
JP2016073052A (en) | Switching controller | |
JP2013187940A (en) | Power conversion device | |
WO2013054741A1 (en) | Power converter and method for controlling power converter | |
US10144296B2 (en) | Gate driver with temperature compensated turn-off | |
US20220038093A1 (en) | Gate driver | |
CN111231692A (en) | Inverter system with enhanced common source inductance generated at gate driver | |
US10615682B2 (en) | Electrically driven vehicle inverter device | |
JP2020114094A (en) | Electric power conversion system |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: HONDA GIKEN KOGYO KABUSHIKI KAISHA, JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SHIMANE, IWAO;ADACHI, SATORU;TAKANOHASHI, HIROAKI;REEL/FRAME:012366/0362 Effective date: 20001128 |
|
FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
FPAY | Fee payment |
Year of fee payment: 4 |
|
REMI | Maintenance fee reminder mailed | ||
LAPS | Lapse for failure to pay maintenance fees | ||
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
|
FP | Lapsed due to failure to pay maintenance fee |
Effective date: 20100507 |