CN1700573A - Inverter device and inverter module - Google Patents
Inverter device and inverter module Download PDFInfo
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- CN1700573A CN1700573A CN 200510072876 CN200510072876A CN1700573A CN 1700573 A CN1700573 A CN 1700573A CN 200510072876 CN200510072876 CN 200510072876 CN 200510072876 A CN200510072876 A CN 200510072876A CN 1700573 A CN1700573 A CN 1700573A
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Abstract
An object is to provide an inverter device capable of detecting the welding of a switching device in early stages, and in summary, the inverter device is equipped with a parallel circuit of a charging circuit and a switch connected between a battery and an inverter module, and comprises a capacitor charged from the battery via the charging circuit; a resistor to discharge the capacitor; a serial circuit including resistors to detect a voltage after the switch; and a diode connected between a connection point of the serial circuit including the resistors on a positive line and a connection point of the capacitor, and directed forward to the capacitor side.
Description
Technical field
The present invention relates to possess the charging device between DC power supply of being connected in and the inverter and the parallel circuits of switching device; And will to be used for by switching dc voltage conversion be that the switch element group of the pseudo-alternating voltage of three-phase is located at the inner inverter module that forms of molded assembly.
Background technology
In recent years, as the aircondition of used for electric vehicle, developing the aircondition of having installed with the motor compressor of battery power drives.As shown in Figure 7, this aircondition is made of battery (DC power supply) 401, DC-to-AC converter 408 and motor compressor 410.
Described DC-to-AC converter 408 comprises: as the derailing switch 402 of the switching device that is connected in series with battery 401; Charging device 411 in parallel with this derailing switch 402 and that constitute by resistance 404 and derailing switch 403; The switch element group 412 who is constituted by the illustrated diode of omission that switch element 414 and absorption switching overvoltage are used is overmolded to the molded assembly 415 inner inverter modules 405 that constitute; With capacitor 406.In addition, the switch element group 412 of described inverter module 405 is that being used for the dc voltage conversion of battery 401 is after the pseudo-alternating voltage of three-phase, is applied on the motor compressor 410 and drives the parts of the motor of this motor compressor 410.
Described capacitor 406 is to be used for the parts of service voltage stably to switch element group 412.In addition, the resistance 404 of described charging device 411 is when the direct voltage that applies battery 401, is used to suppress flow into the parts of the impulse current of capacitor 406.Promptly, because the existence of this resistance 404, when connecting battery 401, the Closing Switch device 403 by opening described derailing switch 402, flow through electric current via this resistance 404, thereby can suppress: the impulse current that is produced when applying the voltage of battery 401 (for example, with reference to No. 3341327 communique of special permission).
But in this aircondition, although send the instruction of opening derailing switch 402 by omitting illustrated control device, because deposited, it still is the possibility of the state of closure that derailing switch 402 is arranged.Therefore, in the past, divider resistance was set, confirmed the deposited generation of derailing switch 402 by the terminal voltage that detects this divider resistance in the front and back of derailing switch 402.Promptly, between electrode line 416 that becomes position between derailing switch 402 leading portions and the battery 401 and the negative line 418 and become between the negative line 418 of the electrode line 416 of position between derailing switch 402 back segments and the switch element group 412 and battery 401, connect voltage detecting circuit respectively, the voltage that each voltage detecting circuit detected is input to controller.
At this, irrelevant with the open and-shut mode of derailing switch 402 under battery 401 connected states, the voltage of importing to controller from the voltage detecting circuit of derailing switch 402 leading portions is similar to the voltage that becomes battery 401.And, if derailing switch 402 opened, then to the voltage vanishing from the voltage detecting circuit of derailing switch 402 back segments of controller input; Under the state that derailing switch 402 is closed, voltage becomes: much at one in the voltage (more or less voltage drop) from the voltage detecting circuit of derailing switch 402 leading portion sides.Thus, by the voltage of the voltage detecting circuit of derailing switch 402 front and back that are input to controller, can detect the open and-shut mode of derailing switch 402.Therefore, can judge: although carry out the control that derailing switch 402 is opened by controller, derailing switch 402 is in the deposited of closure state, so-called derailing switch 402.
Yet, as mentioned above, in DC-to-AC converter 408, be provided with the capacitor 406 of big electric capacity, because the discharge voltage of this capacitor 406 is measured voltage and can not reduced immediately, so can not earlier detection go out the deposited of derailing switch 402.
On the other hand, in such aircondition, under the situation that battery 401 oppositely connects, damage capacitor 406 or switch element group 412.The charging charge of capacitor 406 in addition, contacts the people under the situation of terminal of battery 401, owing to can produce uncomfortable phenomenons such as electric shock.In order to prevent these, also having: the formation that capacitor 406 sides become the diode of forward is installed at charging device 411 in the past.
Yet appending of this diode also can cause all sizes of device to enlarge.On the other hand, particularly in the used for electric vehicle aircondition, owing to being installed on the vehicle, so except being installed in the relation that is provided with in the limited narrow engine room in space in order to drive motor compressor, also do not allow relevant size to enlarge, be necessary to seek further miniaturization on the contrary.
Summary of the invention
The present invention carries out for the technical problem that solves in the past, and its purpose is, a kind of deposited DC-to-AC converter that can earlier detection goes out switching device is provided.
Another object of the present invention is, a kind of inverter module that dwindles that can seek to be provided with the space is provided.
That is, DC-to-AC converter of the present invention, it comprises the charging device that is connected between DC power supply and the inverter and the parallel circuits of switching device, comprising: the capacitor that is recharged through charging device from DC power supply; The discharge resistance of this capacitor; The voltage detecting circuit of the back segment voltage of sense switch device; And be connected between this voltage detecting circuit and the capacitor and with the diode of capacitor one side as forward.
In addition, DC-to-AC converter of the present invention wherein, comprises the voltage that detects according to voltage detecting circuit in foregoing invention, judges the deposited control device of switching device.
In addition, DC-to-AC converter of the present invention, wherein, the voltage that voltage and voltage detecting circuit detected of control device comparison switching device leading portion in foregoing invention under it differs from for the situation in the prescribed limit, judges that switching device is deposited.
According to the present invention, owing to be the DC-to-AC converter that possesses the parallel circuits of charging device between DC power supply of being connected and the inverter and switching device, comprising: the capacitor that is recharged through charging device from DC power supply; The discharge resistance of this capacitor; The voltage detecting circuit of the back segment voltage of sense switch device; Be connected between this voltage detecting circuit and the capacitor and with the diode of capacitor one side as forward; So by this diode, even before capacitor discharges fully, as long as switching device is a normal cutoff, the magnitude of voltage of voltage detecting circuit descended with regard to moment.
On the other hand, under switching device was deposited situation, the voltage of voltage detecting circuit can not descend.
Therefore, for example, by voltage according to voltage detecting circuit detected, the voltage that voltage and voltage detecting circuit detected that compares the switching device leading portion, for under the situation of prescribed limit, the judgement switching device is deposited, thereby can distinguish in early days that this is deposited in its difference.
In addition, inverter module of the present invention, it is that inner to be provided with by switching dc voltage conversion be the inverter module that the switching device group of the pseudo-alternating voltage of three-phase forms at molded assembly, wherein, in molded assembly inside as integrally moulded: be connected between DC power supply and the switch element group and with the diode of this switch element group one side as forward.
In addition, the inverter module of invention wherein is provided with in foregoing invention: the pin that is used for the capacitor that charges through charging device from DC power supply is connected diode forward one side.
According to the present invention, owing to be that inner to be provided with by switching dc voltage conversion be in the inverter module that forms of the switching device group of the pseudo-alternating voltage of three-phase at molded assembly, in molded assembly inside as integrally moulded: be connected between DC power supply and the switch element group and with the diode of this switch element group one side as forward; So compare with the situation that the reverse diode that is connected caused damage or electric shock usefulness that will prevent DC power supply is installed in external substrate, can seek tangible miniaturization, can reduce that the space being set.In addition, owing to also can carry out the heat radiation of diode, also can guarantee insulation distance simultaneously, so can constitute high performance inverter module by molded.
In addition, be connected the pin of diode forward one side owing to being provided with the capacitor that is used for charging through charging device, so become: can connect diode and capacitor without barrier from DC power supply.
Description of drawings
Fig. 1 is the circuit diagram of an embodiment that possesses the used for electric vehicle aircondition of DC-to-AC converter of the present invention.
Fig. 2 is the control program figure of the controller of DC-to-AC converter of the present invention.
Fig. 3 is the time diagram of the action of expression derailing switch of DC-to-AC converter of the present invention and motor compressor.
Fig. 4 is of used for electric vehicle aircondition who possesses another inverter module of the present invention
The circuit diagram of embodiment.
Fig. 5 is the stereogram of inverter module of Fig. 4 of the state that is molded in molded assembly inside.
Fig. 6 is another of used for electric vehicle aircondition of inverter module that possesses the invention of Fig. 4
The circuit diagram of embodiment.
Fig. 7 is the circuit diagram that possesses the used for electric vehicle aircondition of conventional inversion apparatus.
Embodiment
Below, describe embodiments of the present invention with reference to the accompanying drawings in detail.
(embodiment 1)
Fig. 1 is the power circuit diagram of an embodiment that possesses the used for electric vehicle aircondition of DC-to-AC converter 8 of the present invention.
In Fig. 1, the 1st, as the main battery of electric automobile DC power supply, by DC-to-AC converter 8 of the present invention, to motor compressor 10 supply capabilities of aircondition.Though from described battery 1 output dc voltage, to motor compressor 10 (motor), supply with: the inverter module 35 (inverter of the present invention) of the DC-to-AC converter 8 that will be narrated by the back is transformed to the voltage of pseudo-three-phase alternating current.
Above-mentioned DC-to-AC converter 8 is by constituting with resistance 31,31 and inverter module 35 as the derailing switch 2 of switching device or as the charging circuit 7 of charging device, four capacitors 30, discharges.
Above-mentioned inverter module 35 is to be provided with by switching in the inside of molded assembly 40 the switch element group 12 of voltage transformation for pseudo-three-phase alternating current formed.The illustrated diode of omission that this switch element group 12 is used by switch element 14 and absorption switching overvoltage constitutes, and is connected between the electrode line 4 (for example, about DC ± 350V) and negative line 6 of battery 1.
In addition, described derailing switch 2 is connected on the electrode line 4 between battery 1 and the switch element group 12.Described capacitor 30 is the parts that are used for to switch element group 12 stable supplying voltages, is connected in parallel between the electrode line 4 and negative line 6 between derailing switch 2 and the switch element group 12.From described battery 1 by charging circuit 7 described later with charge charging to each capacitor 30.In addition, discharge is with resistance the 31, the 31st, and the discharge resistance of the electric charge that is charged to each capacitor 30 of being used for discharging is connected between the electrode line 4 and negative line 6 between capacitor 30 and the switch element group 12.
Described charging circuit 7 is made of the series circuit of derailing switch 3 and positive temperature coefficient thermis 18, is connected in parallel on the derailing switch 2.This charging circuit 7 is used for suppressing the impulse current by each capacitor 30 and is created in the circuit of the surge voltage of each capacitor 30 when the voltage that applies battery 1.
On the other hand, in DC-to-AC converter 8, be provided with: the dividing potential drop resistance 50,51,52,53 that is used for the voltage of sense switch device 2 front and back.That is, between the negative line 6 of electrode line 4 that becomes position between derailing switch 2 back segments and the capacitor 30 and battery 1, connect the series circuit (voltage detecting circuit) of resistance 50 and 51.
In addition, between the electrode line 4 and negative line 6 that become position between derailing switch 2 leading portions and the battery 1, connect the series circuit (voltage detecting circuit) of resistance 52 and 53.Described resistance the 50, the 51st is used for the resistance of the back segment voltage of sense switch device 2, and resistance the 52, the 53rd is used for the resistance of the leading portion voltage of sense switch device 2.
In addition, in an embodiment, resistance 50 is identical resistance value with resistance 52, and same, resistance 51 and 53 is identical resistance value.And the resistance value of resistance 50 and resistance 52 is fully greater than resistance 51 that is connected these negative line 6 sides and 53 resistance value.Also have, the terminal voltage of resistance 51 and resistance 53 is imported in the controller 60.This controller 60 is control device of DC-to-AC converter 8, the switching of control switch device 2 and derailing switch 3 etc.And as the back narration, this controller 60 is judged the deposited of derailing switch 2 according to the terminal voltage of resistance 51 and resistance 53.
And then, in DC-to-AC converter 8 of the present invention, on the series circuit (voltage detecting circuit) of resistance 50 and 51 and the electrode line 4 between the described capacitor 30, be provided with diode 70.That is, diode 70 is connected the tie point of resistance 50 and resistance 51 and is bordering on most on the electrode line 4 between the tie point of the capacitor 30 that is provided with on the circuit of derailing switch 2 (being the capacitor 30 that the leftmost side is provided with among Fig. 1), is forward with capacitor 30 sides.
In addition, in molded assembly 40, be equipped with: the pin two 0 that connects the battery 1, derailing switch 2, motor compressor 10 etc. of this molded assembly 40 switch inside element group 12 and molded assembly 40 outsides.By this pin two 0, can connect the machine of molded assembly 40 inside and molded assembly 40 outsides without barrier.
Below, the action of the DC-to-AC converter of the present invention 8 of above-mentioned formation is described in conjunction with Fig. 2 and Fig. 3.At this, Fig. 2 is the flow chart that explanation is controlled by the deposited detection action of 60 pairs of derailing switches 2 of controller of DC-to-AC converter 8; Fig. 3 is the time diagram of the action of explanation derailing switch 2, derailing switch 3 and motor compressor 10.In addition, at the state that also is not activated electric automobile, controller 60 is controlled to be dissengaged positions with each derailing switch 2,3.
Then, if start electric automobile (ING (igniter) connection) in the step S1 of Fig. 2, then controller 60 judges whether from being located at the controller input driving command signal of the indoor illustrated aircondition of omission of car in step S2.If the indoor temperature of present car is higher than set point and imports the driving command signals by the controller of described aircondition to controller 60, then controller 60 is in step S3, judges: whether the voltage V1 according to the electrode line 4 of detected derailing switch 2 leading portions of the terminal voltage of the resistance 53 of described derailing switch 2 leading portions be higher than+and 250V and being lower than+400V.At this moment, for just often, irrelevant with the open and-shut mode of derailing switch 2 at the voltage of battery 1, the voltage V1 of electrode line 4 that is input to derailing switch 2 leading portions of described controller 60 becomes: be approximately equal to battery 1 voltage (described+350V).And, the voltage V1 that is input to controller 60 for+below the 250V or+situation more than the 400V under, the voltage of judging battery 1 be unusual, controller 60 enters step S7, stops to export the alarm action of stipulating to the control of DC-to-AC converter 8.
On the other hand, in the step S3 of Fig. 2, be higher than at the voltage V1 that is input to controller 60+250V and being lower than+situation of 400V under, the voltage of judging battery 1 is normal, controller 60 enters step S4, judges: whether the voltage V2 according to the electrode line 4 of the derailing switch that terminal voltage detected 2 back segments of the resistance 51 of derailing switch 2 back segments is higher than V1-10V.At this, controller 60 this moment is controlled to be derailing switch 2 and derailing switch 3 is cut off.In addition, because diode 70 is a forward with capacitor 30 sides, so even have charging charge in the capacitor 30, as long as derailing switch 2 and derailing switch 3 are normal condition, the voltage V2 of the electrode line 4 of derailing switch 2 back segments is with regard to vanishing.Therefore, before the control of carrying out Closing Switch device 2 and derailing switch 3, be higher than at voltage V2 under the situation of voltage V1-10V (10V is a voltage of having estimated the voltage drop of circuit), can judge that derailing switch 2 or derailing switch 3 are deposited and closed.
Promptly, the voltage V2 of the voltage V1 of the electrode line 4 of controller 60 more described derailing switch 2 leading portions and the electrode line 4 of derailing switch 2 back segments, under the situation in its voltage difference (V1-V2) is prescribed limit (being the scope less than 10V among the embodiment), judge that derailing switch 2 or derailing switch 3 are deposited and closed, enter step S5, stop control output, the alarm of stipulating to DC-to-AC converter 8.Thus, switch element 14 can not become connection, so can not switch on the motor of motor compressor 10.
On the other hand, do not have under the deposited situation, as mentioned above, be input to the voltage V2 vanishing of controller 60, so voltage difference (V1-V2) is more than the 10V through opening at derailing switch 2 and derailing switch 3.Therefore, controller 60 under the value of voltage V1-10V is situation more than the voltage V2, is judged as derailing switch 2 and derailing switch 3 and does not produce depositedly in step S4, enters step S6 from step S4, the control of beginning Fig. 3.
That is, controller 60 is at first at the state of opening derailing switch 2 (derailing switch 2 state for cutting off) direct Closing Switch device 3 down, makes electric current from battery 1 via positive temperature coefficient thermis 18 and diode 70, by capacitor 30, and capacitor charged.Positive temperature coefficient thermis 18 is from the body heating, to increase resistance, so play a part the resistance of current value that inhibition is passed through.Thus, impulse current can be suppressed, capacitor for voltage protection 30 or switch element group 12 can be sought.
Then, controller 60 (in the present embodiment be Closing Switch device 33 seconds after) in the timing that finishes to the charging of capacitor 30, Closing Switch device 2, thereafter (after in the present embodiment being 1 second after the Closing Switch device 2), open the derailing switch 3 of charging circuit 7, become later on: the voltage of battery 1 is applied to switch element group 12 through derailing switch 2.In addition, the connection of the switch element 14 of controller 60 control switch element group 12 disconnects, and generates the pseudo-three-phase alternating voltage of assigned frequency, and is applied on the motor of motor compressor 10, drives this motor with above-mentioned operating frequency.
Then, if controller input running stop signal from described aircondition, then after the switching manipulation of the switch element 14 of shutdown switch element group 12, controller 60 is opened (cut-out) derailing switch 2 and is stopped to supply with to switch element group 12 power supply, stops the running of motor compressor 10.The charging charge of capacitor 30 is discharged with resistance 31,31 by discharge with the official hour constant, but, if derailing switch 2 and derailing switch 3 have been opened, then owing to can not apply the voltage of battery 1, so by the existence of diode 70, the voltage V2 of the electrode line 4 of derailing switch 2 back segments drops to zero in the moment that derailing switch 2 is opened.
At this, controller 60 comparative voltage V2 and voltage V1 immediately after this derailing switch 2 is opened, same as mentioned above, judge whether voltage V2 is higher than (V1-10V) (10V is a voltage of having estimated the voltage drop of circuit).Then, under its voltage difference (V1-V2) is situation in the prescribed limit (with above-mentioned same, less than 10V), be judged as derailing switch 2 or derailing switch 3 is deposited and closed,, stop control output, the alarm of stipulating to DC-to-AC converter 8 as above-mentioned same.Thus, switch element 14 can not become connection, can not switch on the motor of motor compressor 10.
But in the past, even derailing switch 2 is an open mode, till capacitor 30 whole discharges, the voltage V2 of the electrode line 4 of derailing switch 2 back segments also can become the charging voltage of capacitor 30, can vanishing.That is, even derailing switch 2 is opened, till being discharged fully with resistance 31,31 by discharge to the electric charge that is charged to capacitor 30, voltage V2 also can become high value, so even derailing switch 2 or derailing switch 3 are deposited, can not judge that immediately it is deposited from voltage V2.
On the other hand, as described herein, by being provided with capacitor 30 sides on the tie point of resistance 50 and the electrode line 4 between capacitor 30 tie points is the diode 70 of forward, thereby reverse current can not pass through, before therefore even capacitor 30 discharges fully, as long as derailing switch 2 normally cuts off, voltage V2 also can the moment vanishing.Thus, even before capacitor 30 discharges fully, as mentioned above, by comparative voltage V1 and voltage V2, thereby open and-shut mode that can sense switch device 2 can be distinguished the deposited of derailing switch 2 and derailing switch 3 in early days.
In addition, by diode 70, even when battery 1 oppositely connects, also can prevent capacitor 30 or switch element group's 12 damage; Or the people contacts electricity when the terminal of battery 1 side, the improper phenomenon of electric shock etc. owing to the charging charge of capacitor 30.Thus, can seek to improve the fail safe and the reliability of this DC-to-AC converter 8.
(embodiment 2)
Then, in conjunction with Fig. 4 and Fig. 5 another embodiment of the present invention is described.
Fig. 4 is the power circuit diagram of the used for electric vehicle aircondition of the invention under this situation of expression, and Fig. 5 is the stereogram of the inverter module 135 of this embodiment of expression.
In Fig. 4, the 101st, as the main battery of the DC power supply of electric automobile, via derailing switch 102 or as charging circuit 107, the capacitor 130 of charging device, the DC-to-AC converter 108 of the formations such as using resistance 131 and inverter module of the present invention 135 of discharging, supply with DC power supply to the motor compressor 110 of aircondition.From described battery 101, though output dc voltage is supplied with to motor compressor 110: the inverter module 135 that will be narrated by the back is transformed to the voltage of pseudo-three-phase alternating current.
Described inverter module 135 is that inner to be provided with by switching voltage transformation be that the switch element group 112 of the pseudo-alternating voltage of three-phase forms at molded assembly 140.The illustrated diode of omission that this switch element group 112 is used by switch element 114 and absorption switching overvoltage constitutes, and is connected between the electrode line 104 (for example, about DC+350V) and negative line 106 of battery 101.
Described derailing switch 102 is connected on 112 of battery 101 and switch element groups' the electrode line 104.Capacitor 130 is the capacitors that are used for to switch element group 112 stable supplying voltages, be connected 112 of derailing switch 102 and switch element groups, between electrode line 104 and the negative line 106.In addition, discharge resistance 131 is that be used for will be by the resistance of the charge discharge of this capacitor 130 chargings, be connected 112 of capacitor 130 and switch element groups, between electrode line 104 and the negative line 106.This resistance 131 is molded in molded assembly 140 inside.
Described charging circuit 107 is made of the series circuit of the diode 119 that derailing switch 103, positive temperature coefficient thermis 118 and back will be narrated, and is connected in parallel with derailing switch 102.This charging circuit 107 is used to suppress the impulse current by capacitor 130 and is created in surge voltage on the capacitor 130 when applying battery 101 voltages.
Promptly, controller 160 bases of DC-to-AC converter 108 are from the running instruction of the illustrated controller of omission of aircondition, at first, Closing Switch device 103 under the state of opening derailing switch 102 (cut-out), make electric current from battery 101 via positive temperature coefficient thermis 118 and diode 119, flow into capacitor 130 and charge.Owing to positive temperature coefficient thermis 118 increases resistance value from the body heating, so play a part to suppress institute by current value.Thus, can seek: suppress impulse current, and capacitor for voltage protection 130 or switch element group 112.
Then, in the timing that the charging to capacitor 130 finishes, controller 160 makes derailing switch 102 closures, thereafter, opens the derailing switch 103 of charging circuit 107, then via derailing switch 102, applies the voltage of battery 101 to switch element group 112.The connection of the switch element 114 of controller 160 control switch element group 112 disconnects, and generates the pseudo-alternating voltage of three-phase of assigned frequency, and is applied on the motor of motor compressor 110 and drives it.
Then, according to the running designated order from the controller of described aircondition, controller 160 is opened (cut-out) derailing switch 102, stops the running of motor compressor 110.
On the other hand, described diode 119 is located between the battery 101 and switch element group 112 of charging circuit 107, is forward with switch element group 112 sides.That is, the diode 119 of present embodiment is between battery 101 and switch element group 112, by battery 101 on the charging circuit 107 of the electrode line 104 of capacitor 130 charging usefulness, capacitor 130 sides are provided with as forward.
By this diode 119, can prevent: battery 101 oppositely connects when waiting, and applies reverse voltage and causes capacitor 130 or switch element group's 112 damage through charging circuit 107; The perhaps improper phenomenon of getting an electric shock during the terminal of people's hand contact battery 101.
And in the present invention, above-mentioned diode 119 and switch element group 112 are molded in molded assembly 140 inside together.
At this, in the past, because this diode arrangement is on circuit substrate, so produce the problem that DC-to-AC converter enlarges.On the other hand, as described in present embodiment, for the motor compressor that carries out the used for electric vehicle aircondition drives this DC-to-AC converter is installed under the situation on the vehicle, is necessary on being installed in the basis that is provided with in the limited narrow engine room in space, seek its miniaturization.
Therefore, as described herein, by diode 119 in molded assembly 140 inside as integrally moulded, thereby can seek the remarkable miniaturization of DC-to-AC converter 108.Thus, can reduce: possess this inverter module 135 DC-to-AC converter 108 the space is set.
In addition, by molded diode 119, thereby the heat radiation of diode 119 also can be carried out with the cooling mechanism (radiator fan) of inverter module 135.Therefore, there is no need for the heat radiation of resistance to be provided with separately cooling mechanism, so can seek the minimizing of number of parts.And, also can guarantee the insulation distance of diode 119.Therefore, can provide high performance inverter module 135.
On the other hand, in DC-to-AC converter 108, be provided with: the dividing potential drop resistance 150,151,152,153 that is used for sense switch device 102 front and back voltages.That is, become the series circuit (voltage detecting circuit) that is connected resistance 150,151 between the negative line 106 of the electrode line 104 of 130 positions of derailing switch 102 back segments and capacitor and battery 101.
In addition, become between the electrode line 104 and negative line 106 of derailing switch 102 leading portions and 101 positions of battery, connect the series circuit (voltage detecting circuit) of resistance 152,153.Described resistance 150,151 sense switch devices 102 back segment voltages, resistance 152,153 sense switch devices 102 leading portion voltages.
In addition, in an embodiment, establish resistance 150 and resistance 152 and be identical resistance value, same, establish the identical resistance value of resistance 151 and resistance 153.And the resistance value of resistance 150 and resistance 152 fully is connected the resistance value of the resistance 151 and the resistance 153 of negative line 106 sides greater than these.And the terminal voltage of resistance 151 and resistance 153 is input to controller 160.
At this, under the state that has connected battery 101, irrelevant with the open and-shut mode of derailing switch 102, the terminal voltage V1 that is input to the resistance 151 of controller 160 is substantially equal to the voltage of battery 101.And, in the state that capacitor 130 discharges fully,, then be input to the terminal voltage V2 vanishing of the resistance 153 of controller 160 if derailing switch 102 has been opened, under the state of derailing switch 102 closures, voltage V2 roughly becomes V1 (more or less voltage drop).Thus, from the resistance 151 that is input to controller 160, terminal voltage V1, the V2 of resistance 153, can detect the open and-shut mode of derailing switch 102.Therefore, although carry out the control of opening of derailing switch 102 by controller 160, the state that can judge derailing switch 102 closures is the deposited of so-called derailing switch 102.
In addition, in molded assembly 140, be equipped with: be used to connect switch element group 112 in this molded assembly 140 or discharge with battery 101, derailing switch 102 and the motor compressor 110 of resistance 131, molded assembly 140 outsides, pin one 20.By these pin ones 20, can connect the machine of molded assembly 140 inside and molded assembly 140 outsides without barrier.
In addition, in molded assembly 140, also be equipped with: be used for diode 119 is connected pin one 22 on the charging circuit 107 of molded assembly 140 outsides.By this pin one 22, as described herein,, also can be connected without barrier on the charging circuit 107 that becomes the capacitor of molded assembly 140 outsides 130 leading portions even diode 119 is being located under the situation of molded assembly 140 inside.
(embodiment 3)
Below, another embodiment of above-mentioned inverter module is described in conjunction with Fig. 6.Fig. 6 represents: the power circuit diagram of an embodiment that possesses the used for electric vehicle aircondition of the inverter module 235 under this situation.In addition, in Fig. 6, attached has been parts of same function or similar effect with the parts with Fig. 4 and Fig. 5 same-sign.
In Fig. 6, the 235th, the inverter module of present embodiment is supplied with to motor compressor 110: be transformed to the pseudo-voltage that exchanges of three-phase by this inverter module 235.
This inverter module 235 and the above embodiments are same, are that the switch element group 112 that the pseudo-alternating voltage of three-phase is used forms in molded assembly 140 inner settings by switching voltage transformation.The illustrated diode of omission that this switch element group 112 is used by switch element 114 and absorption switching overvoltage constitutes, and is connected between the electrode line 104 (about DC+350V) and negative line 106 of battery 101.
At this, in the inverter module 235 of present embodiment, be built-in with diode 170.This diode 170 is located between battery 1 and the switch element group 112, and is forward with switch element group 112 sides.The diode 170 of present embodiment is connected on the series circuit (voltage detecting circuit) and the electrode line 104 between the described capacitor 130 of described resistance 150 and resistance 151.That is, diode 170 is connected on the electrode line 104 between the tie point of the tie point of resistance 150 and resistance 151 and capacitor 130, and is forward with capacitor 130 sides.
In addition, in molded assembly 140, be equipped with: the pin one 20 that is used to connect molded assembly 140 switch inside element group 112 and battery 101, derailing switch 102 and the motor compressor 110 etc. of molded assembly 140 outsides.By these pin ones 20, can connect molded assembly 140 inside and the machine that connects molded assembly 140 outsides without barrier.
And also be provided with: the capacitor 130 that will be recharged through charging circuit 107 from battery 101 is connected the pin one 23 that the forward side of diode 170 is used as described above.By these pin ones 23, can be connected capacitor 130 the forward side of the diode 170 of molded assembly 140 inside without barrier.In addition, this pin one 23 is also same with above-mentioned pin 122, is provided with as illustrated in fig. 5.
Below, in conjunction with above-mentioned Fig. 2 and the as above action of the DC-to-AC converter of the present invention 108 of formation of Fig. 3 explanation.In addition, controller 160 is controlled to be dissengaged positions to each derailing switch 102,103 under the state that electric automobile is not activated.
And if start electric automobile (ING (igniter) connection) in the step S1 of Fig. 2, then controller 160 judges whether by the controller input running command signal that is located at the indoor illustrated aircondition of omission of car in step S2.If the indoor temperature of present car is higher than set point and imports the running command signals by the controller of described aircondition to controller 160, then controller 160 is in step S3, judges: according to the terminal voltage of the resistance 153 of described derailing switch 102 leading portions and whether the voltage V1 of the electrode line 104 of detected derailing switch 102 leading portions is higher than+and 250V and being lower than+400V.At this moment, for just often, irrelevant with the open and-shut mode of derailing switch 102 at the voltage of battery 101, the voltage V1 of electrode line 104 that is input to derailing switch 102 leading portions of described controller 160 becomes: the voltage (about described+350V) that is substantially equal to battery 101.Therefore, the voltage V1 that is input to controller 160 for+below the 250V or+situation more than the 400V under, the voltage of judging battery 101 be unusual, controller 160 enters step S7, stops to export the alarm action of stipulating to the control of DC-to-AC converter 108.
On the other hand, in the step S3 of Fig. 2, voltage V1 at the electrode line 104 of derailing switch 102 leading portions that are input to controller 160 is higher than+situation of 250V and being lower than+400V under, controller 160 enters step S4, judges: according to derailing switch 102 back segment resistance 151 and whether the voltage V2 of detected derailing switch 102 back segment electrode lines 104 is higher than V1-10V.At this, controller 160 is controlled to be cut-out with derailing switch 102 and derailing switch 103 this moment.In addition, because diode 170 is a forward with capacitor 130 sides, so even temporarily there is charging charge in the capacitor 130, as long as derailing switch 102 and derailing switch 103 are normal condition, the voltage V2 of the electrode line 104 of derailing switch 102 back segments is with regard to vanishing.Therefore, before the control of carrying out Closing Switch device 102 and derailing switch 103, voltage V2 is higher than under the situation of voltage V1-10V (10V is a voltage of having estimated the voltage drop of circuit), can judge: derailing switch 102 or derailing switch 103 are deposited and closed.
Promptly, the voltage V2 of the voltage V1 of the electrode line 104 of controller 160 more described derailing switch 102 leading portions and the electrode line 104 of derailing switch 102 back segments, under the situation in its voltage difference (V1-V2) is prescribed limit (being the scope less than 10V among the embodiment), be judged as derailing switch 102 or derailing switch 103 is deposited and closed, enter step S5, stop control output, the alarm of stipulating to DC-to-AC converter 108.Thus, owing to switch element 114 can not connected, so do not switch on the motor of motor compressor 110.
On the other hand, do not have deposited and under the situation about opening at derailing switch 102 and derailing switch 103, as mentioned above, owing to be input to the voltage V2 vanishing as described above of controller 160, so poor (V1-V2) is more than the 10V.Therefore, controller 160 under the value of voltage V1-10V is situation more than the voltage V2, is judged as and does not produce the deposited of derailing switch 102 and derailing switch 103 in step S4, enters step S6 from step S4, the control of beginning Fig. 3.
Promptly, controller 160 is (state that derailing switch 102 still cuts off) following direct Closing Switch device 103 under the state of opening derailing switch 102 at first, the electric current that makes battery 101 is through positive temperature coefficient thermis 118 and diode 170, flows into capacitor 130 and capacitor is charged.Positive temperature coefficient thermis 118 increases resistance from the body heating, so play a part the resistance of current value that inhibition is passed through.Thus, can seek: suppress impulse current, and capacitor for voltage protection 130 or switch element group 112.
Then, controller 160 is in the timing (after 3 seconds after in the present embodiment being Closing Switch device 103) that the charging to capacitor 130 finishes, Closing Switch device 102, thereafter (after in the present embodiment being 1 second after the Closing Switch device 102), open the derailing switch 103 of charging circuit 107, become later on:, the voltage of battery 101 is applied to switch element group 112 through derailing switch 102.In addition, the connection of the switch element 114 of controller 160 control switch element group 112 disconnects, and generates the pseudo-alternating voltage of three-phase of assigned frequency, and is applied on the motor of motor compressor 10, drives this motor with above-mentioned operating frequency.
Then, if import the running stop signal from the controller of described aircondition, then controller 160 is opened (cut-out) derailing switch 102 and is stopped to supply with to switch element group 112 power supply, stops the running of motor compressor 110.The charging charge of capacitor 130 is with the official hour constant, discharge with resistance 131 by discharge, but, if derailing switch 102 and derailing switch 103 have been opened, then can not apply battery 101, because the existence of diode 170, the voltage V2 of the electrode line 104 of derailing switch 102 back segments drops to zero in the moment that derailing switch 102 is opened.
At this, immediately comparative voltage V2 and the voltage V1 of controller 160 after this derailing switch 102 is opened, same as mentioned above, judge whether voltage V2 is higher than (V1-10V) (10V is a voltage of having estimated the voltage drop of circuit).Then, with above-mentioned same, be that prescribed limit is (with above-mentioned same in its voltage difference (V1-V2), scope less than 10V) under Nei the situation, is judged as derailing switch 102 or derailing switch 103 is deposited and closed, with above-mentioned same, stop control output, the alarm of stipulating to DC-to-AC converter 108.Thus, switch element 114 can not connected, and can not switch on the motor of motor compressor 110.
But in the past, even under the state that derailing switch 102 is opened, till capacitor 130 whole discharges, the voltage V2 of the electrode line 104 of derailing switch 102 back segments also can become the charging voltage of capacitor 130, can vanishing.That is, even derailing switch 102 is opened, till being discharged fully with resistance 131 by discharge to the electric charge that is charged by capacitor 130, voltage V2 becomes high value, so even derailing switch 102 or derailing switch 103 are deposited, can not judge that immediately it is deposited from voltage V2.
On the other hand, by being provided with capacitor 130 sides on the tie point of resistance 150 and the electrode line 104 between capacitor 130 tie points is the diode 170 of forward, thereby can oppositely not pass through electric current, even so before capacitor 130 discharges fully, as long as derailing switch 102 is normal the cut-out, voltage V2 will the moment vanishing.Thus,, come the open and-shut mode of sense switch device 102, can distinguish the deposited of derailing switch 102 and derailing switch 103 in early days even before capacitor 130 discharges fully, as mentioned above, also can become by comparative voltage V1 and voltage V2.
In addition, by diode 170, even battery also can prevent capacitor 130 or switch element group's 112 damage during 101 reverse connections; Or the people is when contacting the terminal of battery 101 sides, also can prevent the improper phenomenons such as electric shock that the charging charge owing to capacitor 130 produces.Thus, can seek to improve the fail safe and the reliability of this DC-to-AC converter 108.
In addition, molded by diode 170 is carried out as one in molded assembly 140 inside as mentioned above, thus can seek the remarkable miniaturization of DC-to-AC converter 108.Thus, can reduce the space that is provided with of the DC-to-AC converter 108 that possesses this inverter module 235.
And, molded by diode 170 is carried out, thus the heat radiation of diode 170 also can be carried out with the cooling mechanism (radiator fan) of inverter module 235.Therefore, there is no need for the heat radiation of resistance to be provided with separately cooling mechanism, can seek the minimizing of number of parts.And, also can guarantee the insulation distance of diode 170.Therefore, can provide high performance inverter module 235.
Like this, molded by diode 170 is carried out as one in molded assembly 140 inside as described in present embodiment, thus can seek the remarkable miniaturization of DC-to-AC converter 108.Thus, can reduce the space that is provided with of the DC-to-AC converter 108 that possessed this inverter module 235.
And, molded by diode 170 is carried out, thus the heat radiation of diode 170 also can be carried out with the cooling mechanism (radiator fan) of inverter module 235.Therefore, there is no need for the heat radiation of resistance to be provided with separately cooling mechanism, can seek the minimizing of number of parts.And, also can guarantee the insulation distance of diode 170.Therefore, can provide high performance inverter module 235.
In addition, in each above-mentioned embodiment, in each charging circuit 107, derailing switch 103 is set respectively, still, be not limited to these, also can be located in the charging circuit 107 and derailing switch be located at respectively on the electrode line 104 of (leading portion of derailing switch 2) after each battery 101.In addition, shown each numerical value of each embodiment is not limited to those.
Claims (5)
1, a kind of DC-to-AC converter comprising being connected the charging device between DC power supply and the inverter and the parallel circuits of switching device, is characterized in that, comprising:
The capacitor that is recharged through described charging device from described DC power supply;
The discharge resistance of this capacitor;
Detect the voltage detecting circuit of the back segment voltage of described switching device; With
Be connected between this voltage detecting circuit and the described capacitor, and with this capacitor side diode that is forward.
2, DC-to-AC converter according to claim 1 is characterized in that, possesses: according to the voltage that described voltage detecting circuit detected, judge the deposited control device of described switching device.
3, DC-to-AC converter according to claim 2, it is characterized in that, the voltage that voltage and described voltage detecting circuit detected of the more described switching device leading portion of described control device is under the situation of prescribed limit in its voltage difference, judges the deposited of described switching device.
4, a kind of inverter module, it is to be that the switching device group of the pseudo-alternating voltage of three-phase forms inner the setting by switching dc voltage conversion of molded assembly, it is characterized in that, in described molded assembly inside as integrally moulded: be located between DC power supply and the described switch element group and be the diode of forward with this switch element group side.
5, inverter module according to claim 4 is characterized in that, also is provided with: the pin that is used for the capacitor that is recharged through described charging device from described DC power supply is connected described diode forward one side.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004146119 | 2004-05-17 | ||
| JP2004146117 | 2004-05-17 | ||
| JP2004146117A JP2005328674A (en) | 2004-05-17 | 2004-05-17 | Inverter device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1700573A true CN1700573A (en) | 2005-11-23 |
| CN100481688C CN100481688C (en) | 2009-04-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100728768A Expired - Fee Related CN100481688C (en) | 2004-05-17 | 2005-05-17 | Inverter device |
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| Country | Link |
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| JP (1) | JP2005328674A (en) |
| CN (1) | CN100481688C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106981881A (en) * | 2016-01-18 | 2017-07-25 | 台达电子企业管理（上海）有限公司 | A kind of photovoltaic generating system and its rapidly switch off method |
| CN109601022A (en) * | 2017-07-28 | 2019-04-09 | 三菱电机株式会社 | The method for detecting abnormality of DC-to-AC converter and DC-to-AC converter |
| US10802083B2 (en) | 2012-05-24 | 2020-10-13 | Webasto Charging Systems, Inc. | EVSE welded contactor detector |
| CN111869086A (en) * | 2018-12-29 | 2020-10-30 | 华为技术有限公司 | Inverter |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5741168B2 (en) * | 2011-04-14 | 2015-07-01 | トヨタ自動車株式会社 | Power supply system, vehicle equipped with the same, and control method of power supply system |
| JP6011455B2 (en) * | 2012-05-17 | 2016-10-19 | 株式会社豊田自動織機 | Load drive device |
| CN104764142B (en) * | 2015-03-20 | 2017-06-13 | 广东志高空调有限公司 | A kind of air-conditioning electrical heating safety control circuit |
| JP7205401B2 (en) * | 2019-06-24 | 2023-01-17 | 日新電機株式会社 | Relay failure determination device and DC power distribution device |
| JP7459469B2 (en) | 2019-09-20 | 2024-04-02 | 株式会社デンソーウェーブ | Industrial Control Output Module |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0343119A (en) * | 1989-07-06 | 1991-02-25 | Shizuoka Seiki Co Ltd | Abnormality detection circuit for electrolysis finishing processing device |
| JPH0322867A (en) * | 1989-06-16 | 1991-01-31 | Mitsubishi Electric Corp | Rush current limiting device for dc power source |
| JP2000278802A (en) * | 1999-03-23 | 2000-10-06 | Toyota Motor Corp | Failure decision system |
| JP2001327001A (en) * | 2000-05-11 | 2001-11-22 | Toyota Motor Corp | System relay diagnostic device and method thereof in hybrid vehicle |
-
2004
- 2004-05-17 JP JP2004146117A patent/JP2005328674A/en active Pending
-
2005
- 2005-05-17 CN CNB2005100728768A patent/CN100481688C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10802083B2 (en) | 2012-05-24 | 2020-10-13 | Webasto Charging Systems, Inc. | EVSE welded contactor detector |
| CN106981881A (en) * | 2016-01-18 | 2017-07-25 | 台达电子企业管理（上海）有限公司 | A kind of photovoltaic generating system and its rapidly switch off method |
| CN109601022A (en) * | 2017-07-28 | 2019-04-09 | 三菱电机株式会社 | The method for detecting abnormality of DC-to-AC converter and DC-to-AC converter |
| CN111869086A (en) * | 2018-12-29 | 2020-10-30 | 华为技术有限公司 | Inverter |
| CN111869086B (en) * | 2018-12-29 | 2022-07-12 | 华为数字能源技术有限公司 | Inverter |
| US11637431B2 (en) | 2018-12-29 | 2023-04-25 | Huawei Digital Power Technologies Co., Ltd. | Inverter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100481688C (en) | 2009-04-22 |
| JP2005328674A (en) | 2005-11-24 |
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