CN202404203U - Testing device for testing intelligent power module - Google Patents
Testing device for testing intelligent power module Download PDFInfo
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- CN202404203U CN202404203U CN2011205232806U CN201120523280U CN202404203U CN 202404203 U CN202404203 U CN 202404203U CN 2011205232806 U CN2011205232806 U CN 2011205232806U CN 201120523280 U CN201120523280 U CN 201120523280U CN 202404203 U CN202404203 U CN 202404203U
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Abstract
The utility model provides a testing device for testing an intelligent power module. The testing device comprises a to-be-tested intelligent power module composed of 2n drive circuits and 2n power switch devices, wherein 2n drive signals are input into the 2n drive circuits; a periphery function module is composed of n resistors, wherein the 2n power switch devices are grouped in pairs, the drain electrode of a first power switch device in each group is connected with a high voltage, the source electrode of a second power switch device is grounded, simultaneously the source electrode of the first power switch device is connected with the drain electrode of the second power switch device and also connected with one end of one resistor among the n resistors and then used as an output to output a voltage signal, the other ends of the resistors are connected together; the input end of a receiving display and state comparison module is used for receiving the voltage signal, displaying a corresponding waveform, and furthermore comparing the displayed waveform with a preset normal waveform to judge whether the to-be-tested intelligent power module is normal or not. The testing device can be used for quickly testing the working state of the intelligent power module.
Description
Technical field
The utility model relates to the ic test technique field, relates in particular to a kind of proving installation that is used to test SPM.
Background technology
SPM is a kind of high reliability power electronic devices that integrates device for power switching, gate leve driving circuit and over-voltage over-current protection circuit, mainly is suitable for the frequency converter and the various inverter of drive motor.
The inner core texture of SPM as shown in Figure 1 is m the power drive passage (m is the natural number greater than 1) that is become with m set of power switches by m road driving circuit; Each power drive passage all is to be become with 1 set of power switches by 1 road input signal, by the switch of the high-low level power controlling switching device of input signal.
The general method that adopts by the drive test examination of traditional SPM test machine; Each power drive passage employing to SPM adds one road input drive signal; Test the switching function of one road device for power switching, wherein the drive signal of input is a direct current signal.There are following three aspect drawbacks in this method of testing: the one, and test speed is slow, and efficient is low; The 2nd, because SPM is used for driving direct current generator more; In actual working state, often interact between each power drive passage and disturb; Therefore only each power drive passage is pursued the drive test examination; Can't test out between each passage of SPM whether have interference, promptly can't test out SPM and be in the performance under the real duty; The 3rd, because SPM is used for the workplace of high pressure, big electric current more; Present special intelligent power module test machine fetch long price on market; At the research and development initial stage, if only purchase, with the input that improves project greatly in order to test circuit in a small amount to SPM.
Summary of the invention
In order to overcome above weak point; The utility model provides a kind of proving installation that is used to test SPM; Whether the device for power switching switching function that this device not only can test out each power drive passage of SPM quickly and easily is normal; Test out the size of each power drive channels drive ability, can also test out between each power drive passage whether have the phase mutual interference simultaneously, can test out SPM and be in the performance under the real duty.
For this reason, the utility model provides a kind of proving installation that is used to test SPM, comprises SPM to be measured, peripheral functional modules, reception demonstration and state comparison module;
Said SPM to be measured comprises 2n road driving circuit and 2n device for power switching; 2n road driving circuit be input as 2n drive signal, 2n drive signal through 2n road driving circuit carry out signal drive strengthen after, 2n the device for power switching that is sent to SPM to be measured carries out corresponding switch and moves;
Said peripheral functional modules comprises n resistance;
A said 2n device for power switching divides into groups in twos; Be divided into into the n group; The drain electrode of first device for power switching of each group in device for power switching connects the source ground of high voltage, second device for power switching, the source electrode of first device for power switching links together with the drain electrode of second device for power switching and links to each other and as a delivery outlet output voltage signal, the other end of each resistance links together with a end of a resistance in n the resistance simultaneously; N delivery outlet is used to export n road voltage signal and shows and the state comparison module to receiving; N is the natural number greater than 2;
The input end of said reception demonstration and state comparison module links to each other with each delivery outlet of SPM to be measured; Be used to receive voltage signal and show respective waveforms, and according to the drive signal logical relation formation condition of setting display waveform is compared with the normal waveform that presets and to judge whether SPM to be measured is in proper working order.
Further; Said proving installation also comprises analog sensed signal generating module and analog sensed drive signal modular converter: said analog sensed signal generating module output terminal links to each other with the input end of analog sensed drive signal modular converter, is used for sending n phase analog sensed signal to analog sensed drive signal modular converter by the fixed cycle; The output terminal of said analog sensed drive signal modular converter links to each other with the input end of SPM to be measured, is used for that the n phase analog sensed signal that receives is handled the back and produces a described 2n drive signal.
Further, said analog sensed signal generating module comprises the SCM system that is used to send n phase analog sensed signal.
Further, said analog sensed signal generating module comprises the level switch module that is used for n phase analog sensed signal is carried out level conversion.
Further, said analog sensed drive signal modular converter comprises and is used to produce the motor drive module of drive signal and drive signal is carried out filter circuit for filtering.
Further, the fixed cycle of said transmission n phase analog sensed signal is set by the motor actual speed of said motor drive module.
The beneficial effect of the utility model is:
1) proving installation of the utility model proposition can be tested the multichannel device for power switching simultaneously, and test speed is fast, and efficient is high.
2) proving installation of the utility model proposition only needs judge to the waveform that receives in demonstration and the state comparison module whether the duty that just can test each channel power switching device simultaneously is normal; Whether there is the size of interference and each power drive channels drive ability between each passage, can tests out SPM and be in the performance under the real duty.
3) before SPM is delivered to customer, the proving installation that can use the utility model to propose is tested, owing to need not purchase special-purpose intelligent object test machine, can practice thrift R&D costs greatly at the research and development initial stage; Utilize the single-chip simulation real electrical machinery to drive SPM simultaneously, reduced cost effectively.
Description of drawings
Fig. 1 is existing a kind of SPM structural representation;
Fig. 2 is a kind of structural representation that is used to test the proving installation embodiment of SPM of the utility model;
Fig. 3 is a kind of structural representation of peripheral functional modules in the SPM proving installation embodiment fundamental diagram of a kind of 6 power drive passages of the utility model;
Fig. 4 is the output waveform of drive signal A, B, three delivery outlets of C in one-period of the SPM proving installation of a kind of 6 power drive passages of the utility model;
Fig. 5 is a kind of structural representation of peripheral functional modules in the SPM proving installation embodiment fundamental diagram of a kind of 8 power drive passages of the utility model.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is specified.
Embodiment 1:
Be illustrated in figure 2 as a kind of structural representation that is used to test the proving installation embodiment of SPM of the utility model, comprise analog sensed signal generating module 1, analog sensed drive signal modular converter 2, peripheral functional modules 4 and receive showing and state comparison module 5.
Present embodiment has the SPM of 6 power drive passages with test proving installation is an example.
Analog sensed signal generating module 1 comprises SCM system 11 and level switch module 12; Annexation between SCM system 11 and the level switch module 12 is: through SCM system 11 is programmed; Make SCM system 11 send with motor driven systems in the on all four three-phase simulation transducing signal of three-phase transducing signal; This three-phase simulation transducing signal comprises the heat transfer agent of residing all positions of rotor relative stator; And send with the fixed cycle, set according to the motor actual speed cycle length, and the three-phase simulation transducing signal is sent to level switch module 12 to carry out level and transforms.
Analog sensed drive signal modular converter comprises motor drive module 21 and filtering circuit 22; Annexation between them is: motor drive module 21 receives the three-phase simulation transducing signal of the process level conversion that level switch module 12 sends; The three-phase simulation transducing signal that motor drive module 21 sends level switch module 12 is as the position sensor signal in the real electrical machinery system; The three-phase simulation transducing signal is handled corresponding 6 road PWM of generation (Pulse Width Modulation; Pulse-length modulation) drive signal; 6 road PWM drive signals that will produce then are sent to filtering circuit 22 and carry out signal filtering; 6 road PWM drive signals are input to SPM 3 to be measured through after the filtering, make that 6 the contained device for power switching 31-36 of 6 tunnel power drive passages in the SPM 3 to be measured carry out the corresponding switch action, produce the correspondent voltage signal at three delivery outlet A, B, the C of SPM.
Receive to show with state comparison module 5 and receive the corresponding display waveform of generation behind the voltage signal of three delivery outlet A, B, C of SPM 3 to be measured; And compare with the precision waveform that is provided with in advance; According to the drive signal logical relation formation condition of setting display waveform and the normal waveform that presets are compared; Whether the switch motion of device for power switching of judging each power drive passage is normal; The size that comprises each power drive channels drive ability, and whether have the phase mutual interference between each power drive passage.
Peripheral functional modules 4 produces each item power supply signal and analog detection signal, is input to SPM 3 to be measured, makes SPM 3 to be measured be in correct duty; And build and test required peripheral circuit.Fig. 3 is a kind of structural representation of peripheral functional modules 4 in embodiment device fundamental diagram of the utility model, comprises power module 41, signal generating module 42, first resistance 43, second resistance 44 and the 3rd resistance 45; Power module 41 and signal generating module 42 produce the testing circuit 37 that power supply signal and analog detection signal are input to SPM 3 to be measured respectively, make SPM 3 to be measured be in correct duty.
SPM 3 inner core textures to be measured are 6 power drive passages that become with 6 set of power switches by No. 6 driving circuits; Each power drive passage all is to be become with 1 set of power switches by 1 road input signal, by the switch of the high-low level power controlling switching device of input signal.6 device for power switching 31-36 in the SPM 3 to be measured divide into groups in twos; Be divided into into three groups; The drain electrode of the device for power switching 31 of first group of device for power switching meets high voltage VDD; The source ground of device for power switching 32, the drain electrode of the source electrode of device for power switching 31 and device for power switching 32 simultaneously link together and are connected in the delivery outlet A of A point as SPM 3 to be measured with an end of first resistance 43; The drain electrode of the device for power switching 33 in second group of device for power switching meets high voltage VDD; The source ground of device for power switching 34, the drain electrode of the source electrode of device for power switching 33 and device for power switching 34 simultaneously link together and are connected in the delivery outlet B of B point as SPM 3 to be measured with an end of second resistance 44; The drain electrode of the device for power switching 35 in the 3rd group of device for power switching meets high voltage VDD; The source ground of device for power switching 36, the drain electrode of the source electrode of device for power switching 35 and device for power switching 36 simultaneously link together and are connected in the delivery outlet C of C point as SPM 3 to be measured with an end of the 3rd resistance 45; The other end that first resistance, 43, the second resistance, 44, the three resistance 45 do not link to each other with 6 device for power switching is parallelly connected.
6 road PWM drive signals by 2 generations of analog sensed drive signal modular converter; Be input to the grid of 6 device for power switching 31-36 respectively through No. 6 driving circuits of SPM 3 to be measured; 6 device for power switching 31-36 carry out the corresponding switch action, by delivery outlet A, delivery outlet B and delivery outlet C output correspondent voltage signal.
The drive signal of 6 road PWM can have multiple value and array mode.The drive signal logical relation formation condition of present embodiment satisfies following three aspects:
(1) 2n drive signal divided into groups in twos, be divided into n group: first group of drive signal 1 and 2, second groups of drive signals 3 and 4 ..., n group drive signal 2n-1 and 2n;
(2) same group of 2 interior drive signals forbid being simultaneously H, and the state of each group is three kinds: A condition H/L, B state L/H and C state L/L; H representes high level, and L representes low level;
(3) as far as the state of n group signal, in some signals moments, A condition must occur and can only occur once, and the B state must occur and can only occur once, and the C state is unrestricted; In a complete signal period, each group signal all must live through A condition, B state and C state.For instance, a signal period is divided into 6 signal momentary status, 1-6 representes with sequence number, and said 6 drive signal logical relations can be as shown in table 1, and H representes high level, and L representes low level.
The height logical relation table of table 16 road PWM drive signals
The order that the height logic of 6 road PWM drive signals changes in one-period be from sequence number 1 to sequence number 2 to sequence number 3 to sequence number 4 to sequence number 5 to sequence number 6, arrive sequence number 1 circular flow next cycle again.
Being in sequence number 1 with 6 road PWM drive signals is example; Because drive signal 1 be H with drive signal 4, device for power switching 31 and 34 is in open mode, and electric current is flowed through device for power switching 31 and device for power switching 34 to ground (0V) from high voltage VDD; This moment, delivery outlet A was connected to high voltage VDD through device for power switching 31; Delivery outlet A output HIGH voltage VDD, delivery outlet B is through device for power switching 34 ground connection (0V), delivery outlet B output LOW voltage 0V; Delivery outlet C voltage is the partial pressure value that the voltage difference between delivery outlet A and the delivery outlet B is passed through first resistance 43 and second resistance 44; Delivery outlet C output voltage computing formula is Voutc=VDD*R44/ (R43+R44), and when first resistance 43 and second resistance 44 were got similar resistance, delivery outlet C output voltage was calculated as 1/2VDD.
In the present embodiment, first resistance 43, second resistance 44 are got identical resistance with the 3rd resistance 45.When 6 road PWM drive signals in one-period when sequence number 1 changes to sequence number 6 always, the voltage signal situation of change of delivery outlet A, delivery outlet B and delivery outlet C is as shown in table 2 under the normal condition.
The voltage signal situation of change table of three delivery outlet outputs of table 2
| Sequence number | | B | C | |
| 1 | VDD | 0 | 1/2VDD | |
| 2 | |
1/2VDD | 0 | |
| 3 | 1/2VDD | VDD | 0 | |
| 4 | 0 | |
1/ |
|
| 5 | 0 | 1/2VDD | VDD | |
| 6 | 1/2VDD | 0 | VDD |
Can know by table 2; As 6 road PWM (Pulse Width Modulation; Pulse-length modulation) drive signal is when sequence number 1 changes to sequence number 6 always; The oscillograph that uses the peak value detecting pattern shows and during state comparison module 5, can detect display waveform as shown in Figure 4 from A, B, three delivery outlets of C as receiving.
Because the high level of signal output waveform is a device for power switching 31,33,35 to be connected high voltage VDD and form, therefore export the driving force that difference between high level and the high voltage VDD just can reflect device for power switching 31,33,35.Through detecting the high voltage output of A, B, three delivery outlet waveforms of C, can detection power switching device 31, the driving force of device for power switching 33, device for power switching 35.
Connect ground (0 level) formation because the low level of signal output waveform is a device for power switching 32,34,36, so the difference between output low level and the ground (0 level) just can reflect the driving force of device for power switching 32,34,36.Through detecting the low-voltage output of A, B, three delivery outlet waveforms of C, can detection power switching device 32, the driving force of device for power switching 34, device for power switching 36.
Owing to if disturb, then will inevitably influence the normal switch of each device for power switching in the system, promptly former should be that high level will not appear in the place of high level; Low level place occurs and low level will not occur; In this case, the profile of signal output waveform will change, and therefore only need the profile of signal output waveform is judged; If with inconsistent normally, then can judging, profile occurs in the system disturbing.Through detecting the profile of A, B, three delivery outlet waveforms of C, can detect whether normal switch of each device for power switching, and whether exist between each power drive passage and interfere with each other.
Embodiment 2:
Below, the proving installation that has a SPM of 8 power drive passages with test is again done one and is given an example.As shown in Figure 5; 8 power drive passages will produce A, B, C, four delivery outlets of D; The connected mode of the SPM proving installation of 8 power drive passages and the generation rule of each delivery outlet output voltage are identical with embodiment 1; Do not do at this and to give unnecessary details, present embodiment is done emphasis for example to the height logical relation of 8 drive signals and the voltage signal situation of change of each delivery outlet output.
Present embodiment is divided into 8 signal momentary status with a signal period, and 1-8 representes with sequence number, and a kind of logical relation of said 8 drive signals can be as shown in table 3 below.
The height logical relation table of table 38 road PWM drive signals
In the present embodiment, first resistance 43, second resistance 44, the 3rd resistance 45, the 4th resistance 46 are got identical resistance.When 8 road PWM drive signals in one-period when sequence number 1 changes to sequence number 8 always, the voltage signal situation of change of delivery outlet A, delivery outlet B, delivery outlet C and delivery outlet D is as shown in table 4 under the normal condition.
The voltage signal situation of change table of four delivery outlet outputs of table 4
| Sequence number | A | | C | D | |
| 1 | VDD | 0 | 1/ |
1/2VDD | |
| 2 | VDD | 1/2VDD | 0 | 1/2VDD | |
| 3 | 1/2VDD | VDD | 0 | 1/2VDD | |
| 4 | 0 | VDD | 1/ |
1/ |
|
| 5 | 0 | 1/2VDD | VDD | 1/2VDD | |
| 6 | 1/2VDD | 0 | VDD | 1/2VDD | |
| 7 | 1/2VDD | 0 | 1/2VDD | VDD | |
| 8 | 1/2VDD | VDD | 1/2VDD | 0 |
Present embodiment can also be tested the SPM of 10 even more a plurality of power drive passages, and method of testing and proving installation are similar to the method for testing and the proving installation of the SPM of 6,8 power drive passages of test, do not give unnecessary details again here.
It is emphasized that; The described embodiment of the utility model is illustrative; Rather than it is determinate; Therefore the utility model is not limited to the embodiment described in the embodiment, every by those skilled in the art according to other embodiments that the technical scheme of the utility model draws, belong to the protection domain of the utility model equally.
Claims (6)
1. a proving installation that is used to test SPM is characterized in that, comprises SPM to be measured, peripheral functional modules, reception demonstration and state comparison module;
Said SPM to be measured comprises 2n road driving circuit and 2n device for power switching; 2n road driving circuit be input as 2n drive signal, said 2n drive signal through 2n road driving circuit carry out signal drive strengthen after, 2n the device for power switching that is sent to SPM to be measured carries out corresponding switch and moves;
Said peripheral functional modules comprises n resistance;
A said 2n device for power switching divides into groups in twos; Be divided into into the n group; The drain electrode of first device for power switching of each group in device for power switching connects the source ground of high voltage, second device for power switching, the source electrode of first device for power switching links together with the drain electrode of second device for power switching and links to each other and as a delivery outlet output voltage signal, the other end of each resistance links together with a end of a resistance in n the resistance simultaneously; N delivery outlet is used to export n road voltage signal and shows and the state comparison module to receiving; N is the natural number greater than 2;
The input end of said reception demonstration and state comparison module links to each other with each delivery outlet of SPM to be measured; Be used to receive voltage signal and show respective waveforms, and according to the drive signal logical relation formation condition of setting display waveform is compared with the normal waveform that presets and to judge whether SPM to be measured is in proper working order.
2. proving installation as claimed in claim 1 is characterized in that, also comprises analog sensed signal generating module and analog sensed drive signal modular converter:
Said analog sensed signal generating module output terminal links to each other with the input end of analog sensed drive signal modular converter, is used for sending n phase analog sensed signal to analog sensed drive signal modular converter by the fixed cycle;
The output terminal of said analog sensed drive signal modular converter links to each other with the input end of SPM to be measured, is used for that the n phase analog sensed signal that receives is handled the back and produces a described 2n drive signal.
3. proving installation as claimed in claim 2 is characterized in that: said analog sensed signal generating module comprises the SCM system that is used to send n phase analog sensed signal.
4. proving installation according to claim 2 is characterized in that: said analog sensed signal generating module comprises the level switch module that is used for n phase analog sensed signal is carried out level conversion.
5. proving installation according to claim 2 is characterized in that: said analog sensed drive signal modular converter comprises and is used to produce the motor drive module of drive signal and drive signal is carried out filter circuit for filtering.
6. proving installation according to claim 2 is characterized in that: the fixed cycle of said transmission n phase analog sensed signal is set by the motor actual speed of said motor drive module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205232806U CN202404203U (en) | 2011-12-14 | 2011-12-14 | Testing device for testing intelligent power module |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011205232806U CN202404203U (en) | 2011-12-14 | 2011-12-14 | Testing device for testing intelligent power module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102495350A (en) * | 2011-12-14 | 2012-06-13 | 杭州士兰微电子股份有限公司 | Test device and test method for testing intelligent power module |
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2011
- 2011-12-14 CN CN2011205232806U patent/CN202404203U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102495350A (en) * | 2011-12-14 | 2012-06-13 | 杭州士兰微电子股份有限公司 | Test device and test method for testing intelligent power module |
| CN102495350B (en) * | 2011-12-14 | 2014-04-16 | 杭州士兰微电子股份有限公司 | Test device and test method for testing intelligent power module |
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