CN201256377Y - DC frequency changing refrigerator driving module - Google Patents
DC frequency changing refrigerator driving module Download PDFInfo
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- CN201256377Y CN201256377Y CNU2008201500442U CN200820150044U CN201256377Y CN 201256377 Y CN201256377 Y CN 201256377Y CN U2008201500442 U CNU2008201500442 U CN U2008201500442U CN 200820150044 U CN200820150044 U CN 200820150044U CN 201256377 Y CN201256377 Y CN 201256377Y
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Abstract
The utility model relates to a driving module of a direct current frequency conversion refrigerator for driving a compressor motor of a frequency conversion refrigerator, which comprises an inverter unit, a position detecting unit and a detecting control unit, wherein the inverter unit comprises six IGBTs for converting the input direct current voltage into the alternating current voltage for supplying power to a three-phase winding of the compressor motor, the position detecting unit is used for receiving the three-phase counter-electromotive force of the compressor motor and outputs three-phase phase signals which are used for the zero-crossing detection, the detecting control unit is respectively connected with the inverter unit and the position detecting unit. The utility model aims at providing the driving module of a direct current frequency conversion refrigerator, whose integration is high and cost is low and which is reliable and stable, and is used for satisfying the control requirements that the compressor motor of the frequency conversion refrigerator is a direct current brushless motor, which is a direct current brushless motor. Furthermore, the module has the functions of current protection, temperature protection, over/under voltage protection and the like.
Description
Technical field
The utility model relates to frequency conversion refrigerator, relates in particular to a kind of direct current frequency conversion refrigerator driver module that is used for the frequency conversion refrigerator compressor electric motor.
Background technology
Existing freezer compressor is generally constant speed compressor, and promptly alternating current 220V input compressor coil, frequency is 50HZ.Compressor is with the rotation speed operation a little less than 3000RPM, so the control of the cold of refrigerator system is coarse, and temperature fluctuation is big, causes the waste of the energy.In addition, because asynchronous machine induced current in rotor, so having copper loss, iron loss, eddy current to decrease the equal loss on the rotor, refrigerator efficient is low.
The appearance of dc brushless motor is for above problem provides possibility.Dc brushless motor is as the frequency conversion refrigerator compressor electric motor, and its rotor is a permanent magnet, does not have induced current, so the loss of electric machine is little; Yet have only by the control at the driver module of this kind compressor electric motor, dc brushless motor just can be realized comparatively accurate rotating speed control in the very wide range of speeds.
The utility model content
In order to address the above problem; the utility model aims to provide a kind of integrated level height; low-cost, reliable and stable direct current frequency conversion refrigerator driver module; control needs when being dc brushless motor at the frequency conversion refrigerator compressor electric motor, the utility model also has current protection, temperature protection, crosses function such as under voltage protection in addition.
A kind of direct current frequency conversion refrigerator driver module described in the utility model is used to drive the compressor electric motor of frequency conversion refrigerator, and it is characterized in that: it comprises inversion unit, position detection unit and detection control unit, wherein:
Inversion unit comprises six IGBT (Insulated-gate bipolar transistor, igbt), is used for the converting direct-current voltage into alternating-current voltage with input, to the three phase windings power supply of described compressor electric motor;
Position detection unit is used to receive the three-phase back electromotive force of described compressor electric motor, and output is used for the three-phase phase signal of zero passage detection;
Detect control unit, is connected with described inversion unit, position detection unit respectively, be used to receive the three-phase phase signal of exporting from described position detection unit, and be the boundary, detect the three-phase back electromotive force zero-crossing of described compressor electric motor with the rotating speed; This detection control unit comprises the voltage comparator that is arranged on this detection control unit inside, electric current transport and placing device, the current comparator and the register that are connected with this electric current transport and placing device simultaneously, be used for controlling the break-make of described six IGBT on the one hand to described inversion unit output drive signal; To amplify from the dc bus current measuring-signal that described inversion unit receives by described electric current transport and placing device on the other hand; and be transported to described current comparator; be used for comparing, realize the current protecting function of described compressor electric motor with the current protection value of setting.
In above-mentioned direct current frequency conversion refrigerator driver module, on the 11 pin of described inversion unit, the 15 pin, the 19 pin, connect a diode respectively, and the resistance that is connected with described each diode respectively, and connect same power supply at the other end of described each resistance; Simultaneously, respectively between described the 11 pin and the 12 pin, between the 15 pin and the 16 pin, connect an electric capacity between the 19 pin and the 20 pin, and described the 12 pin, the 16 pin, the 20 pin are connected with the 24 pin, the 25 pin, the 26 pin respectively.
In above-mentioned direct current frequency conversion refrigerator driver module, the 21 pin of described inversion unit, the 22 pin, the 23 pin jointly with reference to being connected a resistance between the zero potential, be used for the sample rate current measuring-signal, and this current measurement signal is transported to the 8th pin.
In above-mentioned direct current frequency conversion refrigerator driver module, the three-phase back-emf voltage of described compressor electric motor each mutually the interface by described position detection unit is connected the other end of described each resistance reverse access one diode respectively and between the reference zero potential respectively with an end of a resistance; And described every phase phase signal output is connected a resistance respectively with between the 21 pin of described detection control unit, the 23 pin, the 28 pin.
In above-mentioned direct current frequency conversion refrigerator driver module, between the 14 pin and the 15 pin of described detection control unit, the 14 pin and with reference to zero potential between connect a resistance respectively, be used for determining the multiplication factor of described internal current transport and placing device.
In above-mentioned direct current frequency conversion refrigerator driver module; import the rotating speed of square-wave signal by the 24 pin of described detection control unit as described compressor electric motor; the 22 pin is used to export a pwm pulse (Pulse-width modulation; width-modulation pulse); and the 22 pin and a resistance and be connected with electric capacity that this resistance is connected in series; be used for described pwm pulse is carried out filtering; and the other end of this electric capacity be connected with reference to zero potential; and carry electric potential signal between described resistance and the electric capacity to the 16 pin, be used to determine described current protection value.
In above-mentioned direct current frequency conversion refrigerator driver module, the 7th pin of described inversion unit with reference to zero potential between be connected an electric capacity.
In above-mentioned direct current frequency conversion refrigerator driver module, the 6th pin of described inversion unit is connected with the 4th pin of described detection control unit, when described the 6th pin output low level pulse signal, trigger described detection control unit and interrupt, interrupt service routine is done respective handling.
In above-mentioned direct current frequency conversion refrigerator driver module, the 27 pin of described inversion unit is connected with DC bus-bar voltage; First pin, the tenth pin, the 14 pin, the 18 pin are connected with a power supply respectively.
Owing to adopted above-mentioned technical solution; the utility model provides a kind of driver module of efficient, low-cost, high integration for frequency conversion refrigerator; utilize this driver module; can reliable Detection be zero signal; realize the more accurate rotating speed control (error is less than 3%) of frequency conversion refrigerator compressor electric motor; and realization wide-voltage range (170V-250V); the reliable driving of wide speed regulating range (1200RPM-4500RPM), and current protection be provided, cross under voltage protection, anti-shake, force function such as switching.
Description of drawings
Fig. 1 is the most preferred embodiment block diagram of a kind of direct current frequency conversion refrigerator driver module of the utility model;
Fig. 2 is the most preferred embodiment schematic diagram of inversion unit in a kind of direct current frequency conversion refrigerator driver module of the utility model;
Fig. 3 is the most preferred embodiment schematic diagram of position detection unit in a kind of direct current frequency conversion refrigerator driver module of the utility model;
Fig. 4 is the most preferred embodiment schematic diagram that a kind of direct current frequency conversion refrigerator driver module of the utility model detects control unit.
Embodiment
See also Fig. 1, and in conjunction with Fig. 2., Fig. 3, shown in Figure 4, the utility model, promptly a kind of direct current frequency conversion refrigerator driver module is used to drive the compressor electric motor 4 of frequency conversion refrigerator, comprise inversion unit 1, position detection unit 2 and detect control unit 3, wherein:
Detect control unit 3, is connected with inversion unit 1, position detection unit 2 respectively, be used to receive three-phase phase signal, and be the boundary, the three-phase back electromotive force zero-crossing of detection compressor electric motor 4 with the rotating speed from position detection unit 2 outputs; Detect voltage comparator 31, electric current transport and placing device 32, the current comparator 33 that is connected with electric current transport and placing device 32 and register 34 that control unit 3 comprises the portion of setting within it simultaneously, be used for controlling the break-make of described six IGBT on the one hand to inversion unit 1 output drive signal; To amplify from the dc bus current measuring-signal that inversion unit 1 receives by electric current transport and placing device 32 on the other hand, and be transported to current comparator 33, be used for comparing, realize the current protecting function of compressor electric motor 4 with the current protection value of setting.
Go up connection 15V power supply at the first pin Vcc (L), for inversion unit 1 provides working power, the second pin COM is with reference to zero potential;
The 11 pin Vb (U), the 15 pin Vb (V), the 19 pin Vb (W) respectively with diode D6, diode D5, the negative electrode of diode D4 connects, to guarantee the one-way flow of electric current, diode D6, diode D5, the anode of diode D4 respectively with current limliting resistance R49, resistance R 50, resistance R 51 connects, and in resistance R 49, resistance R 50, the other end of resistance R 51 connects same 15V power supply, for being connected between the 11 pin Vb (U) and the 12 pin Vs (U), between the 15 pin Vb (V) and the 16 pin Vs (V), bootstrap capacitor E4 between the 19 pin Vb (W) and the 20 pin Vs (W), bootstrap capacitor E3, bootstrap capacitor E2 charging, and the 12 pin Vs (U), the 16 Vs (V), the 20 Vs (W) respectively with the 24 pin U, the 25 pin V, the 26 pin W connects, when guaranteeing that brachium pontis gate-drive level is significant level, the gate pole current potential is higher than brachium pontis IGBT and deletes electrode potential 15V, makes the smooth conducting of IGBT;
The 27 pin P is connected with DC bus-bar voltage HV, by the 24 pin U, the 25 pin V, the 26 pin W that is connected with the three-phase end line of compressor electric motor 4 respectively, DC bus-bar voltage HV is outputed on three phase windings of compressor electric motor 4; The tenth pin Vcc (UH), the 14 pin Vcc (VH), the 18 pin Vcc (WH) are connected with a 15V power supply respectively;
Grid at following brachium pontis IGBT, promptly the 21 pin NU, the 22 pin NV, the 23 pin NW jointly with reference to being connected resistance R 226 between the zero potential, be used for the sample rate current measuring-signal, measure bus current value I_sence, and this current measurement signal is transported to the 8th pin Csc for inversion unit 1 current protection usefulness;
The 7th pin Cfod with reference to zero potential between be connected capacitor C 9, when current protection takes place, go up output low level pulse FAULT signal from the 6th pin Vfo, the pulsewidth of this pulse is by the capacitance decision of capacitor C 9; And the 6th pin Vfo is connected with the 4th pin MCES that detects control unit 3, and when the 6th pin Vfo output low level pulse signal, detection trigger control unit 3 interrupts, and interrupt service routine is done respective handling.
In position detection unit 2; the three-phase back electromotive force U ' of compressor electric motor 4; V '; W ' by interface CN201 respectively with current limliting resistance R222; resistance R 221; one end of resistance R 219 connects; resistance R 222; resistance R 221; the other end of resistance R 219 is exported the three-phase phase signal U_Phase that is used for zero passage detection respectively; V_Phase; W_Phase; and oppositely insert diode D301 respectively and between the reference zero potential; diode D302; diode D303; play clamping action; detect control unit 3 with protection; and respectively every phase phase signal output respectively with the 21 pin PD0 that detects control unit 3; the 23 pin PD2; connect resistance R 104 between the 28 pin PD7; resistance R 105; resistance 106 is used for the back electromotive force dividing potential drop.
Detect Electric Machine Control MCU (single-chip microcomputer) ST7MC1K2TC (IC1) that control unit 3 can adopt the ST special use, wherein:
The 30 pin MC00, the 31 pin MC01, the 32 pin MC02, the first pin MC03, the second pin MC04, the 3rd pin MC05 are transported to six tunnel drive signal HSIC3, HSIC5, HSIC8, LSIC3, LSIC5, LSIC8 respectively on the 9th pin IN (UH), the 13 pin IN (VH), the 17 pin IN (WH), the 3rd pin N (UL), the 4th pin IN (VL), the 5th pin IN (WL) of inversion unit 1, with the break-make of control inversion unit 1 interior six IGBT;
The tenth pin MCIA, the 11 pin MCIB, the 12 pin MCIC be three-phase phase signal U_Phase, V_Phase, the W_Phase of 2 outputs of receiving position detecting unit respectively, adopts following two kinds of zero passage detection schemes to detect:
When compressor electric motor 4 rotating speeds when 2400RPM is following, adopt with the benchmark of 0V voltage as zero crossing, compare three-phase back electromotive force U ', V ', the W ' zero crossing of measured compressed electromechanics machine 4 with this benchmark by voltage comparator 31; Detect control unit 3 at PWM_OFF, be to detect voltage comparator 31 output levels between the low period of width-modulation pulse, level is uprised or is three-phase back electromotive force zero passage opportunity during by high step-down by low, serves as according to determining commutation opportunity with zero passage opportunity and current compressor electric motor 4 rotating speeds; Adjust the zero crossing benchmark by the register 34 that detects control unit 3 is set, the angle of overlap degree is carried out hardware compensating, to reach the optimal drive effect; Being provided with this moment between the 21 pin PD0, the 23 pin PD2, the 28 pin PD7 is that input is floating empty, makes resistance R 104, resistance R 105,106 pairs of three-phase back electromotive force of resistance R U ', V ', W ' not influence;
When compressor electric motor 4 rotating speeds when 2400RPM is above, adopt with the benchmark of 1/2 DC bus-bar voltage HV as zero crossing, compare with this benchmark by voltage comparator 31; Detect control unit 3 at PWM_ON, promptly detect voltage comparator 31 output levels between the high period of width-modulation pulse; Control unit 3 is provided with the 21 pin PD0, the 23 pin PD2, the 28 pin PD7 are output low level by detecting, make resistance R 104 and resistance R 223 series connection, resistance R 105 and resistance R 221 series connection, resistance R 106 and resistance R 219 connect, respectively to three-phase back electromotive force U ', V ', W ' dividing potential drop, making three-phase phase signal U_Phase, V_Phase, the W_Phase of output is the voltage after partial signal, be input to voltage comparator 31 again, compare with 1/2 DC bus-bar voltage HV, determine zero crossing.
The 13 pin OAP that detects control unit 3 receives from the dc bus current measuring-signal I_sense of the 8th pin Csc output of inversion unit 1, and be input to electric current transport and placing device 32 and amplify, and connect resistance R 306 at connection resistance R the 307, the 14 pin OAN between the 14 pin OAN and the 15 pin OAZ with between with reference to zero potential, resistance R 307, resistance R 306 are used for determining the multiplication factor of this electric current transport and placing device 32; Current measurement signal after electric current transport and placing device 32 will amplify is transported to an input of current comparator 33, and another input is then determined by the voltage on the 16 pin MCCREF;
Import the rotating speed of square-wave signal by the 24 pin PD3 that detects control unit 3 as compressor electric motor 4, the 22 pin MCPWMV is used to export a pwm pulse (its frequency and duty ratio are set by detecting control unit 3), and the 22 pin MCPWMV and resistance R 315 and be connected with capacitor C 302 that resistance R 315 is connected in series, be used for this pwm pulse is carried out filtering, and the other end of capacitor C 302 be connected with reference to zero potential, the other end of resistance R 315 is connected with the 22 pin MCPWMV; Current potential between resistance R 315 and capacitor C 302 is a direct current, and this DC level is input to the 16 pin MCCREF, and its voltage swing is used to determine the current protection value set; As compressor electric motor 4 dc bus current measuring-signal I_sense during greater than the current protection value set, six road PWM that reset output, binding site detecting unit 2, under the slow-speed of revolution, can adopt the voltage mode current limliting, be the current protection value of dc bus current for setting of compressor electric motor 4, guaranteed very high startup success rate; Under high rotating speed, can adopt single modulation system, promptly during PWM_ON, detect zero crossing, rather than detect zero crossing and change modulation system, avoid changing the vibrating noise problem that causes because of modulation system at PWM_OFF.
In sum; the utility model can reliable Detection be zero signal; realize the more accurate rotating speed control (error is less than 3%) of frequency conversion refrigerator compressor electric motor; and realization wide-voltage range (170V-250V); the reliable driving of wide speed regulating range (1200RPM-4500RPM), and current protection be provided, cross under voltage protection, anti-shake, force function such as switching.The utility model is applied on the direct current frequency conversion refrigerator compressor electric motor, and its peak power output is 175W.Through cold test, noise test and short life test, under bad working environments, but refrigerator compressor motor long-time continuous low speed (1400RPM), (4500RPM), high low speed (1400RPM is to 4500RPM) come and go operation 1000 hours at a high speed, fault-free, and vibrating noise and efficiency all reach the GB requirement, thereby effectively solve the problem that the constant speed refrigerator exists, can realize raising the efficiency, targets such as snap frozen, food fresh keeping.
Below embodiment has been described in detail the utility model in conjunction with the accompanying drawings, and those skilled in the art can make the many variations example to the utility model according to the above description.Thereby some details among the embodiment should not constitute qualification of the present utility model, and the scope that the utility model will define with appended claims is as protection range of the present utility model.
Claims (9)
1. direct current frequency conversion refrigerator driver module is used to drive the compressor electric motor of frequency conversion refrigerator, and it is characterized in that: it comprises inversion unit, position detection unit and detection control unit, wherein:
Inversion unit comprises six IGBT, is used for the converting direct-current voltage into alternating-current voltage with input, to the three phase windings power supply of described compressor electric motor;
Position detection unit is used to receive the three-phase back electromotive force of described compressor electric motor, and output is used for the three-phase phase signal of zero passage detection;
Detect control unit, is connected with described inversion unit, position detection unit respectively, be used to receive the three-phase phase signal of exporting from described position detection unit, and be the boundary, detect the three-phase back electromotive force zero-crossing of described compressor electric motor with the rotating speed; This detection control unit comprises the voltage comparator that is arranged on this detection control unit inside, electric current transport and placing device, the current comparator and the register that are connected with this electric current transport and placing device simultaneously, be used for controlling the break-make of described six IGBT on the one hand to described inversion unit output drive signal; To amplify from the dc bus current measuring-signal that described inversion unit receives by described electric current transport and placing device on the other hand; and be transported to described current comparator; be used for comparing, realize the current protecting function of described compressor electric motor with the current protection value of setting.
2. direct current frequency conversion refrigerator driver module according to claim 1, it is characterized in that: go up connection one diode (D6, D5, D4) at the 11 pin (Vb (U)), the 15 pin (Vb (V)), the 19 pin (Vb (W)) of described inversion unit respectively, and the resistance (R49, R50, R51) that is connected with described each diode respectively, and connect same power supply at the other end of described each resistance; Simultaneously, respectively between described the 11 pin and the 12 pin (Vs (U)), between the 15 pin and the 16 pin (Vs (V)), connect an electric capacity (E4, E3, E2) between the 19 pin and the 20 pin (Vs (W)), and described the 12 pin, the 16 pin, the 20 pin are connected with the 24 pin (U), the 25 pin (V), the 26 pin (W) respectively.
3. direct current frequency conversion refrigerator driver module according to claim 1 and 2, it is characterized in that: the 21 pin (NU) of described inversion unit, the 22 pin (NV), the 23 pin (NW) jointly with reference to being connected a resistance (R226) between the zero potential, be used for the sample rate current measuring-signal, and this current measurement signal is transported to the 8th pin (Csc).
4. direct current frequency conversion refrigerator driver module according to claim 1, it is characterized in that: each phase of three-phase back electromotive force of described compressor electric motor (U ', V ', W ') is connected with an end of a resistance (R223, R221, R219) respectively by the interface of described position detection unit, and the other end of described each resistance respectively and oppositely insert a diode (D301, D302, D303) between the reference zero potential; And described every phase phase signal output is connected a resistance (R104, R105,106) respectively with between the 21 pin (PD0) of described detection control unit, the 23 pin (PD2), the 28 pin (PD7).
5. direct current frequency conversion refrigerator driver module according to claim 1, it is characterized in that: between the 14 pin (OAN) and the 15 pin (OAZ) of described detection control unit, the 14 pin (OAN) and with reference to zero potential between connect a resistance (R307, R306) respectively, be used for determining the multiplication factor of described internal current transport and placing device.
6. direct current frequency conversion refrigerator driver module according to claim 1 or 5; it is characterized in that: import the rotating speed of square-wave signal as described compressor electric motor by the 24 pin (PD3) of described detection control unit; the 22 pin (MCPWMV) is used to export a pwm pulse; and the 22 pin and a resistance (R315) and the electric capacity (C302) that is connected in series with this resistance are connected; be used for described pwm pulse is carried out filtering; and the other end of this electric capacity be connected with reference to zero potential; and the electric potential signal between the 16 pin (MCCREF) described resistance of conveying and electric capacity, be used to determine described current protection value.
7. direct current frequency conversion refrigerator driver module according to claim 1 and 2 is characterized in that: the 7th pin (Cfod) of described inversion unit with reference to zero potential between be connected an electric capacity (C9).
8. according to claim 1 or 2 or 5 described direct current frequency conversion refrigerator driver modules, it is characterized in that: the 6th pin (Vfo) of described inversion unit is connected with the 4th pin (MCES) of described detection control unit, when described the 6th pin output low level pulse signal, trigger described detection control unit and interrupt, interrupt service routine is done respective handling.
9. direct current frequency conversion refrigerator driver module according to claim 1 and 2 is characterized in that: the 27 pin (P) of described inversion unit is connected with DC bus-bar voltage; First pin (Vcc (L)), the tenth pin (Vcc (UH)), the 14 pin (Vcc (VH)), the 18 pin (Vcc (WH)) are connected with a power supply respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201500442U CN201256377Y (en) | 2008-06-26 | 2008-06-26 | DC frequency changing refrigerator driving module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201500442U CN201256377Y (en) | 2008-06-26 | 2008-06-26 | DC frequency changing refrigerator driving module |
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| CN201256377Y true CN201256377Y (en) | 2009-06-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2008201500442U Expired - Lifetime CN201256377Y (en) | 2008-06-26 | 2008-06-26 | DC frequency changing refrigerator driving module |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102832864A (en) * | 2012-08-01 | 2012-12-19 | 遵义天义利威机电有限责任公司 | Position sensorless brushless direct-current motor controller |
| CN105071714A (en) * | 2015-07-31 | 2015-11-18 | 苏州南光电子科技有限公司 | Control system for brushless direct current motor free of position sensor |
| CN104365006B (en) * | 2012-06-22 | 2017-03-08 | 罗伯特·博世有限公司 | Method and apparatus for manipulating inverter |
-
2008
- 2008-06-26 CN CNU2008201500442U patent/CN201256377Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104365006B (en) * | 2012-06-22 | 2017-03-08 | 罗伯特·博世有限公司 | Method and apparatus for manipulating inverter |
| CN102832864A (en) * | 2012-08-01 | 2012-12-19 | 遵义天义利威机电有限责任公司 | Position sensorless brushless direct-current motor controller |
| CN105071714A (en) * | 2015-07-31 | 2015-11-18 | 苏州南光电子科技有限公司 | Control system for brushless direct current motor free of position sensor |
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Granted publication date: 20090610 |