CN209402449U - Power module, air conditioner - Google Patents
Power module, air conditioner Download PDFInfo
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- CN209402449U CN209402449U CN201920003426.0U CN201920003426U CN209402449U CN 209402449 U CN209402449 U CN 209402449U CN 201920003426 U CN201920003426 U CN 201920003426U CN 209402449 U CN209402449 U CN 209402449U
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- bridge arm
- power device
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- power module
- sampling resistor
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Abstract
The utility model provides a kind of power module, air conditioner.Wherein, a kind of power module, comprising: shell；Power switch circuit, setting is inside the housing；At least one sampling resistor, inside the housing, at least one sampling resistor is connected with power switch circuit for setting.By the power module of the utility model, the wiring of resistance can be shortened, reduce line inductance to the interference using voltage, while also simplifying the periphery circuit of power module, practical operation is simple and easy, has good engineering significance and practical value.
Description
Technical field
The utility model relates to technical field of semiconductor device, in particular to a kind of power module and a kind of air-conditioning
Device.
Background technique
Power module be power power electronic device by certain function combination again encapsulating at a module.Power module is
It is made of high-speed low-power-consumption tube chip and the gate drive circuit and fast protection circuit of optimization.It is suitable for driving motor
Frequency converter and various inverters, be frequency control, metallurgical machinery, electric propulsion, servo-drive, frequency-conversion domestic electric appliances it is a kind of very
Ideal power electronic devices.
However, when designing periphery circuit, generally will increase resistance progress for motor control hardware designer
Current sample, a kind of usage mode of existing power module, current sampling resistor need to weld together on a printed circuit,
The problem of when load running, resistance has passed through high current in major loop, has fever, while route designs too long also have very
Big uses the problem of interfering.And heat can be generated when electric current passes through resistance, resistance temperature is increased, and in order to give resistive dissipation,
It may require that complicated cooling measure allows air to take away heat by resistance if you need to design air duct, cause cost relatively high, if
It counts more complicated.
Utility model content
The utility model aims to solve at least one of technical problems existing in the prior art or related technologies.
For this purpose, the one side of the utility model is to propose a kind of power module.
The utility model further aspect is that proposing a kind of air conditioner.
In view of this, the first aspect of the utility model proposes a kind of power module, comprising: shell；Power switch electricity
Road, setting is inside the housing；At least one sampling resistor is arranged inside the housing, at least one sampling resistor and power switch
Circuit is connected.
Power module according to the present utility model, by the way that sampling resistor to be arranged in the shell of power module, with power
Switching circuit is connected, i.e., sampling resistor is built in power module, thus can shorten the cabling of sampling resistor, reduce cloth
Line inductance, sampling resistor can accurately more embody the electricity passed through because of the reduction of wiring inductance because electric current passes through the pressure drop generated
Stream.In this way when power module works, pass through the voltage on detection sampling resistor, so that it may know the electric current in load, accurately
Judge load running characteristic, so as to accurate power control module switch, achievees the purpose that control load.The utility model provides
Power module, can shorten the wiring of resistance, reduce line inductance to the interference using voltage, while also simplifying power mould
The periphery circuit of block, practical operation is simple and easy, has good engineering significance and practical value.
Above-mentioned power module according to the present utility model, can also have following technical characteristic:
In the above-mentioned technical solutions, it is preferable that power switch circuit includes bridge under bridge arm power device and three-phase on three-phase
Arm power device；In the case where the quantity of sampling resistor is three, three sampling resistors are connected to three-phase lower bridge arm function
In rate device between the source electrode of each phase lower bridge arm power device and the direct current negative terminal of power module.
In the technical scheme, the quantity of sampling resistor is one or more, is three in the quantity of sampling resistor
In the case of, by the way that three sampling resistors to be connected to the source electrode of each phase lower bridge arm power device and the direct current of power module
Between negative terminal, when power module work, pass through the voltage on detection sampling resistor, so that it may know the phase current in load,
Accurate judgement load running characteristic achievees the purpose that control load so as to accurate power control module switch.
In any of the above-described technical solution, it is preferable that power switch circuit includes bridge arm power device and three-phase on three-phase
Lower bridge arm power device is wherein provided with a node between the source electrode of three-phase lower bridge arm power device；In the number of sampling resistor
In the case that amount is one, sampling resistor is connected between node and the direct current negative terminal of power module.
In the technical scheme, the quantity of sampling resistor is one or more, is one in the quantity of sampling resistor
In the case of, by the direct current of the node and power module that are connected to sampling resistor between the source electrode of three-phase lower bridge arm power device
Between negative terminal, when power module work, pass through the voltage on detection sampling resistor, so that it may know the bus electricity in load
Stream, accurate judgement load running characteristic achieve the purpose that control load so as to accurate power control module switch.
In any of the above-described technical solution, it is preferable that power module further include: heat sink, setting is inside the housing；At least
One sampling resistor is arranged on heat sink, and heat sink is for radiating at least one sampling resistor.
In the technical scheme, by the way that sampling resistor to be built in power module, and it is arranged on heat sink, sampling electricity
Hindering generated heat when passing through electric current can be radiated by heat sink, to reduce sampling resistor fever to automatically controlled cavity
Influence, while also shorten resistance wiring, reduce line inductance to using voltage interference, simplify periphery circuit design,
It decreases in PCB routing, the occupied space of sampling resistor.
In any of the above-described technical solution, it is preferable that heat sink includes: insulating heat-conductive piece and heat-radiating substrate；At least one
Sampling resistor is arranged in insulating heat-conductive on piece；Insulating heat-conductive piece is used to conduct the heat that at least one sampling resistor generates to scattered
On hot substrate, heat-radiating substrate is for radiating.
In the technical scheme, heat sink is made of heat-radiating substrate and insulating heat-conductive piece, and sampling resistor is placed on insulation and leads
On backing, in this way when power module works, sampling resistor can be passed because electric current is by the heat generated by insulating heat-conductive piece
It leads on heat-radiating substrate, so that it is guaranteed that sampling resistor will not cross cause thermal damage.
In any of the above-described technical solution, it is preferable that heat-radiating substrate is radiator aluminium base plate.
In the technical scheme, heat-radiating substrate type have ceramic substrate, soft printed circuit board, rigid printed circuit board,
Aluminum substrate etc., herein preferably, heat-radiating substrate are aluminum substrate.
In any of the above-described technical solution, it is preferable that power module further include: first capacitor, first capacitor are opened with power
Powered-down road is connected.
In the technical scheme, power module further includes first capacitor, and first capacitor is connected with power switch circuit, tool
For body, first capacitor is connected between the circuit of power factor correction of power module and power switch circuit, and is connected in parallel on function
On the one hand the reactive power of route is on the other hand reduced, is mentioned for improving the power factor of route in the electricity consumption end of rate switching circuit
The efficiency of elevated track.
In any of the above-described technical solution, it is preferable that bridge arm power device in each phase in bridge arm power device on three-phase
Source electrode and drain electrode between be connected to first diode, the anode of first diode is connected to the source electrode of bridge arm power device,
The cathode of one diode is connected to the drain electrode of bridge arm power device；Each phase lower bridge arm power in three-phase lower bridge arm power device
The second diode is connected between the source electrode and drain electrode of device, the anode of the second diode is connected to the source of lower bridge arm power device
Pole, the cathode of diode are connected to the drain electrode of lower bridge arm power device.
In the technical scheme, by being connected to the one or two pole between the source electrode and drain electrode of bridge arm power device in each phase
Pipe, and it is connected to the second diode between the source electrode and drain electrode of each phase lower bridge arm power device, avoid each power device quilt
Each power device of protection, protection power module are played the role of in higher backward voltage breakdown.
In any of the above-described technical solution, it is preferable that bridge arm power device in each phase in bridge arm power device on three-phase
It is insulated gate bipolar transistor with phase lower bridge arm power device each in three-phase lower bridge arm power device.
In the technical scheme, bridge arm power device and each phase lower bridge arm power device in each phase of power switch circuit
Part is insulated gate bipolar transistor, but not limited to this.
The second aspect of the utility model proposes a kind of air conditioner, comprising: such as the function of any one of above-mentioned technical proposal
Rate module, thus the air conditioner has the technical effect of power module whole, repeats no more.
The additional aspect and advantage of the utility model will become obviously in following description section, or practical new by this
The practice of type is recognized.
Detailed description of the invention
The above-mentioned and/or additional aspect and advantage of the utility model from the description of the embodiment in conjunction with the following figures will
Become obvious and be readily appreciated that, in which:
Fig. 1 shows the schematic diagram of the power module of one embodiment according to the present utility model；
Fig. 2 shows the schematic diagrames of the power module of another embodiment according to the present utility model；
Fig. 3 shows the position signal of sampling resistor in the power module of further embodiment according to the present utility model
Figure.
Wherein, corresponding relationship of the Fig. 1 into Fig. 3 between appended drawing reference and component names are as follows:
102 shells, 104 power switch circuits, 106 sampling resistors, 108 heat-radiating substrates, 110 insulating heat-conductive pieces, 112 first
Capacitor.
Specific embodiment
In order to be more clearly understood that the above objects, features, and advantages of the utility model, with reference to the accompanying drawing and have
The utility model is further described in detail in body embodiment.It should be noted that in the absence of conflict, this Shen
The feature in embodiment and embodiment please can be combined with each other.
Many details are explained in the following description in order to fully understand the utility model, still, this is practical
Novel to be implemented using other than the one described here other modes, therefore, the protection scope of the utility model is simultaneously
It is not limited by the specific embodiments disclosed below.
Referring to Fig. 1 to Fig. 3 description according to the power module and air conditioner of some embodiments of the utility model.
As shown in Figure 1 to Figure 2, one embodiment of the first aspect of the utility model provides a kind of power module, packet
It includes: shell 102；Power switch circuit 104 is arranged inside shell 102；At least one sampling resistor 106 is arranged in shell
Inside 102, at least one sampling resistor 106 is connected with power switch circuit 104.
Power module provided by the utility model, by sampling resistor 106 being arranged in the shell 102 of power module,
It is connected with power switch circuit 104, i.e., sampling resistor 106 is built in power module, thus can shortens sampling resistor 106
Cabling, reduce wiring inductance, sampling resistor 106 can more can by the pressure drop generated because of electric current because of the reduction of wiring inductance
Accurately embody the electric current passed through.In this way when power module works, pass through the voltage on detection sampling resistor 106, so that it may
Know the electric current in load, accurate judgement load running characteristic reaches control load so as to accurate power control module switch
Purpose.Power module provided by the utility model can shorten the wiring of resistance, reduce line inductance and do to using voltage
It disturbs, while also simplifying the periphery circuit of power module, practical operation is simple and easy, has good engineering significance and practical valence
Value.
In one embodiment of the utility model, it is preferable that as shown in Figure 1, power switch circuit 104 includes on three-phase
Bridge arm power device Q1 to Q3 and three-phase lower bridge arm power device Q4 to Q6；The situation for being three in the quantity of sampling resistor 106
Under, three sampling resistors 106 are connected to three-phase lower bridge arm power device Q4 each phase lower bridge arm power device into Q6
Between source electrode and the direct current negative terminal of power module.
In this embodiment, the quantity of sampling resistor 106 is one or more, is three in the quantity of sampling resistor 106
In the case where a, by source electrode and power mould that three sampling resistors 106 are connected to each phase lower bridge arm power device
Between the direct current negative terminal of block, when power module work, pass through the voltage on detection sampling resistor 106, so that it may know load
On phase current, accurate judgement load running characteristic reaches the mesh of control load so as to accurate power control module switch
's.
In another embodiment of the utility model, it is preferable that as shown in Fig. 2, power switch circuit 104 includes three-phase
Upper bridge arm power device Q1 to Q3 and three-phase lower bridge arm power device Q4 to Q6, wherein three-phase lower bridge arm power device Q4 is to Q6's
A node is provided between source electrode；In the case where the quantity of sampling resistor 106 is one, sampling resistor 106 is connected to section
Between point and the direct current negative terminal of power module.
In this embodiment, the quantity of sampling resistor 106 is one or more, is one in the quantity of sampling resistor 106
In the case where a, pass through the node and power mould sampling resistor 106 being connected between the source electrode of three-phase lower bridge arm power device
Between the direct current negative terminal of block, when power module work, pass through the voltage on detection sampling resistor 106, so that it may know load
On bus current, accurate judgement load running characteristic reaches the mesh of control load so as to accurate power control module switch
's.
In any of the above-described embodiment, it is preferable that power module further include: heat sink is arranged inside shell 102；Extremely
A few sampling resistor 106 is arranged on heat sink, and heat sink is for radiating at least one sampling resistor 106.
In this embodiment, by the way that sampling resistor 106 to be built in power module, and it is arranged on heat sink, sampling
Resistance 106 when passing through electric current generated heat can be radiated by heat sink, thus reduce sampling resistor 106 fever pair
The influence of automatically controlled cavity, while also shortening the wiring of resistance, line inductance is reduced to the interference using voltage, simplifies periphery circuit
Design, decrease in PCB routing, the occupied space of sampling resistor 106.
In one embodiment of the utility model, it is preferable that as shown in figure 3, heat sink includes: insulating heat-conductive piece 110
With heat-radiating substrate 108；At least one sampling resistor 106 is arranged on insulating heat-conductive piece 110；Insulating heat-conductive piece 110 is near
The heat that a few sampling resistor 106 generates is conducted to heat-radiating substrate 108, and heat-radiating substrate 108 is for radiating.
In this embodiment, heat sink is made of heat-radiating substrate 108 and insulating heat-conductive piece 110, and sampling resistor 106 is placed on
On insulating heat-conductive piece 110, in this way when power module works, sampling resistor 106 can pass through because electric current is by the heat generated
Insulating heat-conductive piece 110 is transmitted on heat-radiating substrate 108, so that it is guaranteed that sampling resistor 106 will not cross cause thermal damage.
In one embodiment of the utility model, it is preferable that heat-radiating substrate 108 is radiator aluminium base plate.
In this embodiment, 108 type of heat-radiating substrate have ceramic substrate, soft printed circuit board, rigid printed circuit board,
Aluminum substrate etc., herein preferably, heat-radiating substrate 108 are aluminum substrate.
In one embodiment of the utility model, it is preferable that as depicted in figs. 1 and 2, power module further include: first
Capacitor 112, first capacitor 112 are connected with power switch circuit 104.
In this embodiment, power module further includes first capacitor 112, first capacitor 112 and 104 phase of power switch circuit
Connection, specifically, first capacitor 112 be connected to power module circuit of power factor correction and power switch circuit 104 it
Between, and it is connected in parallel on the electricity consumption end of power switch circuit 104, on the one hand for improving the power factor of route, on the other hand reduce
The reactive power of route improves the efficiency of route.
In one embodiment of the utility model, it is preferable that as depicted in figs. 1 and 2, bridge arm power device Q1 on three-phase
It is connected to first diode, the anode connection of first diode in each phase between the source electrode and drain electrode of bridge arm power device into Q3
The source electrode of supreme bridge arm power device, the cathode of first diode are connected to the drain electrode of bridge arm power device；Three-phase lower bridge arm
Power device Q4 is connected to the second diode, the second diode into Q6 between the source electrode and drain electrode of each phase lower bridge arm power device
Anode be connected to the source electrode of lower bridge arm power device, the cathode of diode is connected to the drain electrode of lower bridge arm power device.
In this embodiment, by being connected to the one or two pole between the source electrode and drain electrode of bridge arm power device in each phase
Pipe, and it is connected to the second diode between the source electrode and drain electrode of each phase lower bridge arm power device, avoid each power device quilt
Each power device of protection, protection power module are played the role of in higher backward voltage breakdown.
In any of the above-described embodiment, it is preferable that bridge arm power device Q1 bridge arm power in each phase into Q3 on three-phase
Device and three-phase lower bridge arm power device Q4 each phase lower bridge arm power device into Q6 are IGBT (Insulated Gate
Bipolar Transistor, insulated gate bipolar transistor).
In this embodiment, bridge arm power device and each phase lower bridge arm power in each phase of power switch circuit 104
Device is insulated gate bipolar transistor IGBT, but not limited to this.
The embodiment of the second aspect of the utility model provides any in a kind of air conditioner, including such as above-described embodiment
The power module of item, thus the air conditioner has the technical effect of power module whole, repeats no more.
Power module provided by the utility model, air conditioner utilize power module by sampling resistor built in power module
Heat sink radiate, generated heat can be radiated by heat sink when sampling resistor is by very big electric current；Together
When reduce length of arrangement wire, i.e., reduction current sample path, reduce influence of the line inductance to resistance drop, electric current passes through electricity
When resistance, pressure drop is generated on resistance, this uses ohmically pressure drop, feeds back to the MCU of control power module
(Microcontroller Unit, micro-control unit), to reach the mesh of control load to be precisely controlled power module switch
's；It decreases in PCB routing, the occupied space of resistance；Practical operation is simple and easy, has good engineering meaning
Justice is widely applied occasion and very high practical value.
In the description of the present invention, it should be understood that term " first ", " second " are used for description purposes only, and
It cannot be understood as indicating or implying relative importance or implicitly indicate the quantity of indicated technical characteristic.It defines as a result,
The feature of " first ", " second " can explicitly or implicitly include at least one of the features.In the description of the present invention,
The meaning of " plurality " is at least two, such as two, three etc., unless otherwise specifically defined.
In the description of this specification, the description of term " one embodiment ", " some embodiments ", " specific embodiment " etc.
Mean that particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least the one of the utility model
In a embodiment or example.In the present specification, schematic expression of the above terms are not necessarily referring to identical embodiment
Or example.Moreover, the particular features, structures, materials, or characteristics of description can be in any one or more embodiment or examples
In can be combined in any suitable manner.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (10)
1. a kind of power module characterized by comprising
Shell；
Power switch circuit is arranged in the interior of shell；
At least one sampling resistor, setting is in the interior of shell, at least one described sampling resistor and power switch electricity
Road is connected.
2. power module according to claim 1, which is characterized in that
The power switch circuit includes bridge arm power device and three-phase lower bridge arm power device on three-phase；
In the case where the quantity of the sampling resistor is three, three sampling resistors are connected to bridge under the three-phase
In arm power device between the source electrode of each phase lower bridge arm power device and the direct current negative terminal of the power module.
3. power module according to claim 1, which is characterized in that
The power switch circuit includes bridge arm power device and three-phase lower bridge arm power device on three-phase, wherein under the three-phase
A node is provided between the source electrode of bridge arm power device；
In the case where the quantity of the sampling resistor is one, the sampling resistor is connected to the node and the power mould
Between the direct current negative terminal of block.
4. power module according to any one of claim 1 to 3, which is characterized in that further include:
Heat sink is arranged in the interior of shell；
At least one described sampling resistor is arranged on the heat sink, and the heat sink is used for at least one described sampling electricity
Resistance is radiated.
5. power module according to claim 4, which is characterized in that the heat sink includes: insulating heat-conductive piece and heat dissipation
Substrate；
At least one described sampling resistor is arranged in the insulating heat-conductive on piece；
The insulating heat-conductive piece is for conducting the heat that at least one described sampling resistor generates to the heat-radiating substrate, institute
Heat-radiating substrate is stated for radiating.
6. power module according to claim 5, which is characterized in that
The heat-radiating substrate is radiator aluminium base plate.
7. power module according to claim 4, which is characterized in that further include:
First capacitor, the first capacitor are connected with the power switch circuit.
8. power module according to claim 2 or 3, which is characterized in that
It is connected to the one or two pole on the three-phase in bridge arm power device in each phase between the source electrode and drain electrode of bridge arm power device
Pipe, the anode of the first diode are connected to the source electrode of the upper bridge arm power device, and the cathode of the first diode connects
It is connected to the drain electrode of the upper bridge arm power device；
The two or two pole is connected between the source electrode and drain electrode of each phase lower bridge arm power device in the three-phase lower bridge arm power device
Pipe, the anode of second diode are connected to the source electrode of the lower bridge arm power device, and the cathode of the diode is connected to
The drain electrode of the lower bridge arm power device.
9. power module according to claim 8, which is characterized in that
It is every in bridge arm power device and the three-phase lower bridge arm power device in each phase in bridge arm power device on the three-phase
One phase lower bridge arm power device is insulated gate bipolar transistor.
10. a kind of air conditioner characterized by comprising
Such as the power module of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920003426.0U CN209402449U (en) | 2019-01-02 | 2019-01-02 | Power module, air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920003426.0U CN209402449U (en) | 2019-01-02 | 2019-01-02 | Power module, air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209402449U true CN209402449U (en) | 2019-09-17 |
Family
ID=67897785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920003426.0U Active CN209402449U (en) | 2019-01-02 | 2019-01-02 | Power module, air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209402449U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109510562A (en) * | 2019-01-02 | 2019-03-22 | 广东美的暖通设备有限公司 | Power module, air conditioner |
-
2019
- 2019-01-02 CN CN201920003426.0U patent/CN209402449U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109510562A (en) * | 2019-01-02 | 2019-03-22 | 广东美的暖通设备有限公司 | Power module, air conditioner |
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