CN201515278U

CN201515278U - digital motor

Info

Publication number: CN201515278U
Application number: CN2009203114598U
Authority: CN
Inventors: 方建成
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-09-25
Filing date: 2009-09-25
Publication date: 2010-06-23
Anticipated expiration: 2019-09-25

Abstract

The utility model discloses a digital motor which comprises a metal casing which comprises metal casing provided with a fixed mounting hole and a radiation rib. The digital motor is characterized in that a magneto inductor main body is arranged in the metal casing, the left end portion and the right end portion of the rotor of the magneto inductor main body are respectively provided with a bearing and a motor end cap in turn, one side of the motor end cap on the right end portion of the magneto inductor main body is provided with a cooling wind cover, a high pressure brushless motor controller and a radiation vane mounted on the rotary shaft of the rotor of the magneto inductor main body are arranged in the cooling wind cover, and the top surface of the metal casing is provided with a wiring box of a panel with a rotary speed display function and a rotary speed control function. The digital motor has low cost, small volume, big starting torque, wide speed regulating range, complete protection function and high efficiency and power factors. The digital motor can be used in energy-saving and consumption-lowering occasions as information electrons, energy-saving domestic electric appliances, electric tools, tower-free constant-voltage water supply and industrial machinery, textile machinery, printing machinery, food machinery, digital control lathes and the like.

Description

Digital motor

Technical field

The utility model relates to electric motors, especially a kind of digital motor.

Background technology

People generally use the Electric Traction equipment of band stepless speed-regulating device at present, how to be finished by asynchronous motor adapted industrial frequency transformer.Because asynchronous machine is simple in structure, itself can't realize stepless speed regulation; Though the higher industrial frequency transformer of asynchronous motor supplied with variable frequency adapted price can be realized this function, increase the cost of motor several times; Secondly, asynchronous machine is an inductive load, and the system power factor is lower; Industrial frequency transformer AC/DC conversion fraction generally adopts the diode bridge rectification to amplify electrochemical capacitor filtering, and the multiple harmonic of generation is serious to electric network pollution; And frequency converter and variable-frequency motor loaded down with trivial details be connected and the setting of the many specialties of industrial frequency transformer itself also makes troubles to the user.

Summary of the invention

In order to overcome the deficiencies in the prior art, the purpose of this utility model provides a kind of digital motor.It is achieved in that a kind of digital motor, comprises the metal shell with band fixed installation hole and radiating ribs; It is characterized in that: be provided with the magneto body in the described metal shell, the left and right end portions of described magneto body rotor is arranged with bearing and electric motor end cap respectively successively; One side of described magneto body rotor right end portion electric motor end cap is provided with the cooling fan housing, is provided with the high-voltage brushless electric machine controller in the described cooling fan housing and is installed in heat radiation fan blade on the magneto body rotor shaft; Described metal shell end face is equipped with the terminal box of dismantled and assembled band rotating speed demonstration and rotating speed controlled function panel.

Digital motor with current advanced AC variable-frequency speed regulation system than beneficial effect is:

1. efficient height.Even to steady load, digital motor is generally high approximately by 10% than the efficient of AC variable-frequency speed regulation system, than the asynchronous machine or the permagnetic synchronous motor efficient high approximately 2% of the direct power supply of power frequency.

2. starting torque is big.Keep identical starting current, the detent torque of digital motor is generally big about 1.5 times than alternating current asynchronous machine.

3. power factor height.The motor body of digital motor is a kind of motor synchronizing motor, and the rotating speed of the rotating speed of rotor and stator rotating magnetic field always is in synchronous regime.Rotor adopts the strong magnetism excitation of rare earth, power supply circuits applied power factor correcting, is that the motor body or the power factor of whole system are all near 1.

4. speed adjustable range is big.Digital motor can run up as asynchronous machine, also can be as direct current machine at low cruise below 100 rev/mins, and speed ratio can reach 1: 30; And the alternating-current variable frequency motor governing system generally can only be accomplished 1: 10.

5, volume is little, cost is low, use is simple.

Description of drawings

Fig. 1 is the utility model device for carrying out said schematic diagram.

Fig. 2 is the A-A profile of Fig. 1.

Fig. 3 is the utility model embodiment circuit diagram.

Fig. 4 is active power factor calibration (APFC) circuit block diagram on the utility model high-voltage motor controller.

Fig. 5 is the demonstration of the utility model rotating speed, rotating speed adjustment, the overtemperature protection of IGBT switching tube and armature winding overheating protection circuit figure.

Primary clustering is described as follows in the accompanying drawing:

(1). motor installing hole, (2). armature winding, (3). hall position sensor, (4). electric motor end cap,

(5). bearing, (6). permanent-magnet steel rotor, (7). insulating support,

(8). the terminal box of demonstration of band rotating speed and speed regulating control panel, (9). LCDs, (10). the control panel installing hole

(11). " mistake " indicator light, (12). work/shutdown switch, (13). just/the counter-rotating selector switch,

(14). mode of speed regulation selector switch, (15). adjust the rotating speed multiturn potentiometer, (16). " rotating speed increase " button,

(17). " rotating speed minimizing " button, (18). the metal shell of band fixed installation hole and radiating ribs, (19). the non-crystaline amorphous metal stator core, (20). temperature sensor, (21). heat radiation fan blade, (22) .IGBT switching tube radiator, (23). the controller PCB plate, (24). air inlet, (25) .APFC power tube radiator, (26) .APFC energy storage inductor, (27). the cooling fan housing, (28). insulating washer, (29). temperature sensor, (30) .DC-DC reduction voltage circuit, (31) .APFC circuit, (32). the brushless electric machine control circuit, (33). single chip circuit, (34). overvoltage, under-voltage windows detecting circuit, (35) .IR2113 drive circuit, (36). overcurrent sample, testing circuit

(37). liquid crystal display circuit, (38) .IGBT switching circuit, (39) EMI circuit, (40). full-wave rectifier filter circuit, (41). booster diode, (42) .APFC output filter capacitor, (43). voltage zero-cross detects, (44) .IR2110 drives, (45) .APFC switching tube, (46). vibration and compensation RC circuit, (47) .APFC control integrated circuit NCP1653P, (48). current feedback sampling, (49). single-chip microcomputer PIC16F687.

Embodiment

Below in conjunction with drawings and Examples the utility model is described further.

Please refer to Fig. 1 to shown in Figure 5, the utility model provides a kind of digital motor, comprises the metal shell 18 with band fixed installation hole and radiating ribs; It is characterized in that: be provided with the magneto body in the described metal shell 18, the upper and lower end parts of described magneto body is arranged with bearing 5 and electric motor end cap 4 respectively successively; One side of described magneto body end portion electric motor end cap is provided with cooling fan housing 27, is provided with the high-voltage brushless electric machine controller in the described cooling fan housing 27 and is installed in heat radiation fan blade 21 in the rotating shaft of magneto body; Described metal shell 18 end faces are equipped with the terminal box 8 of dismantled and assembled band rotating speed demonstration and rotating speed controlled function panel.

Described magneto body is by the rare earth permanent-magnet steel rotor 6 of no excitation loss, the amorphous alloy stator iron core 19 of tape insulation support 7, on behalf of the latch Hall sensor 3 of rotor-position, armature winding 2 on the iron core and 3 of being contained in the stator core slot form.

Described high-voltage brushless electric machine controller comprises DC-DC reduction voltage circuit 30, active power factor calibration APFC circuit 31, the brushless electric machine control circuit 32 that LB11824M forms; Described brushless electric machine control circuit 32 is connected with switching tube drive circuit of being made up of 3 road IR2113 35 and the three phase bridge circuit of being made up of 6 IGBT 38 in turn; The power input of described three phase bridge circuit 38 is connected with the output of described active power factor calibration APFC circuit 31.

In order to reach better radiating effect, high-voltage brushless electric machine controller described in the utility model further comprises

radiator

22,25, and described radiator is installed in respectively on the switching tube and three phase bridge circuit 38IGBT pipe of active power factor calibration (APFC) circuit 31.

Described high-voltage brushless electric machine controller also comprises protective circuit; described protective circuit is by overvoltage, under-voltage windows detecting circuit 34; overcurrent sample, testing circuit 36 are installed in the temperature sensor 20 on the IGBT switching tube and the temperature sensor 29 that is installed on the armature winding is formed.

The single chip circuit 33 that the terminal box of described band rotating speed demonstration and rotating speed controlled function panel is made up of PIC16F687, LCDs 37, rotating speed control is adjusted panel 8 and is formed.Described rotating speed control is adjusted panel 8 and is comprised: adjust rotating speed multiturn potentiometer (15), mode of speed regulation selector switch (14), " rotating speed increase " button (16), " rotating speed minimizing " button (17), " mistake " indicator light (11), work/shutdown switch (12), just/counter-rotating selector switch (13).

In order further to deepen those skilled in the art to understanding of the present utility model, we can say that the utility model is a kind of digital motor, metal shell with band fixed installation hole and radiating ribs, dress magneto body, hall position sensor, high-voltage brushless circuit for controlling motor, cooling mechanism, protective circuit and rotating speed display circuit in the metal shell; The removable panel of its medium speed demonstration and band controlled function is fixed on the terminal box of metal chassis end face when using on this machine.

Described magneto body may be split into four parts: the rare earth permanent-magnet steel rotor that does not have excitation loss, the amorphous alloy iron core stator of tape insulation support, ad-hoc location is equipped with 3 latch Hall sensors of representing rotor-position in the stator core slot, the armature winding on the stator core.Wherein stator core is used amorphous alloy material instead by traditional silicon steel sheet, and the amorphous alloy material advantage is: no-load loss is low, saturation flux density is high, high-frequency loss is few; Directly contact with armature winding and armature winding member stress distortion when the coiling for fear of iron core, add the better rigidity insulating support at amorphous alloy iron core; The motor windings coiling is finished after the test passes with epoxy resin impregnated and embedding; The motor of this spline structure had both had the firm mechanical equivalent of light feature of alternating current machine, had the good governor control characteristics of direct current machine again.

As shown in Figure 3, described high-voltage brushless circuit for controlling motor comprises: APFC circuit, electronic switching circuit, speed-regulating control circuit and DC-DC auxiliary power circuit.

The APFC circuit function is: 1, the input AC electricity is converted to direct current (AC-DC); 2, power factor of electric network is proofreaied and correct (PFC).Because direct current machine work the time needs DC power supply, motor speed, moment of torsion are relevant with DC power supply voltage simultaneously; This circuit exchanges civil power by current rectifying and wave filtering circuit and converts the use of direct current supply machine to, simultaneously, also unstable direct current behind the rectifying and wave-filtering is carried out voltage stabilizing.The utility model adds one-level IR2110 with " ON " NCP1653 power factor controlling chip and promotes to be designed to the input of 90～265VAC wide-range voltage, stablize Boost Active Power Factor Correction (APFC) circuit of 400VDC output, finish AC-DC, the DC voltage stabilizing is also proofreaied and correct power factor of electric network simultaneously.

Electronic switching circuit is mainly finished: the contactless commutation of armature electric current.Mainly the three-phase bridge output circuit of being made up of: brushless electric machine control chip, drive circuit, 6 IGBT pipes, motor speed adjustment and just/reverse turn control circuit is formed.The brushless electric machine control chip LB11824M that the utility model selects for use Japanese SANYO to make is designed to full-wave direct current brushless electric machine control circuit.LB11824M include three-phase drive circuit, PWM oscillator, logical circuit, sensor signal amplification, comparator and+12V ,+5V output.Be installed in three Hall elements representing rotor-position on the stator core and signal delivered to 3 IN+ inputs of LB11824M, chip is by offering an explanation out six efficient codings of representative motor rotor position with 3 IN-level ratio, chip is by the correct sequential of decoding output UH, VH, WH, UL, VL, WL, amplify through three IR2113 half-bridges, drive three-phase bridge circulation conducting, shutoff that six N raceway groove IGBT power tubes are formed, thereby the control motor rotates.LB11824M have motor speed and motor just/the counter-rotating controlled function; The VCTL pin input voltage that changes LB11824M can change output duty cycle, thereby changes motor speed; The F/R pin level of gating LB11824M is high/low, and the defeated people's coding of the transducer of appointment will change the rectification sequential in high level and low transition, thereby changes the motor direction of rotation.

The DC-DC auxiliary power circuit is the small-power step-down switching power supply with multichannel output, it provides+and the 12V power supply is to LB11824M, also provide+the 5V power supply is to single-chip microcomputer and LCD rotating speed display circuit, provide simultaneously+15V is to NCP1653 and three IR2113 half-bridge drive circuits.

Described protective circuit comprises: under-voltage protection, rotation-clogging protection and overcurrent protection.Wherein under-voltage protection mainly realizes by detecting LB11824M pin LVS voltage; Voltage on the LVS pin is lower than normal working voltage, and (representative value: 3.8V), then three tunnel outputs (UH, VH, WH) are turn-offed.Rotation-clogging protection be by the chip detection position sensor signal in a period of time during no change, three tunnel outputs (UH, VH, WH) are turn-offed; Chip RF pin is then finished controller output current inspection side, as this pin voltage 〉=0.5V, and the current-limiting protection action.Cooperate the Aided Design of some peripheral circuits by LB11824M, can effectively control motor and when stall, under-voltage and overvoltage, burn motor and controller.

Described rotating speed adjustment, rotating speed demonstration, motor overheating and the overtemperature protection of IGBT switching tube are finished by the PIC16F687 single-chip microcomputer.It is that input signal is caught that the utility model is set single-chip microcomputer RA0 mouth, the pulse number of exporting by the pin HP that calculates LB11824M obtains motor speed information, external " rotating speed adjustment " the multiturn potentiometer present position voltage corresponding A/D conversion value of this information and single-chip microcomputer RC0 mouth compares, table look-up and obtain motor speed control coding, this coding by D/A conversion from the output of single-chip microcomputer RA2 mouth, for the VCTL pin of LB11824M provides speed controling signal.Some situation need be when keyboard or other control circuit change motor speed, " mode of speed regulation selector switch " on the panel switched to the another location, press " rotating speed+", " rotating speed " button or from other control appliance interface input control impuls, single-chip microcomputer can " increase progressively " or " successively decreasing " represents the A/D value of motor speed with a fixed step size, can revise current motor speed equally.Single Chip Microcomputer (SCM) program by button, potentiometer or control impuls rotating speed modification value on the cycle detection control panel after 3S preserve this parameter automatically.Rotating speed shows to be finished by LCDs HXYG12864J; To LB11824M pin HP output pulse number counting, computing, deliver to the instant rotating speed that demonstrates motor after the HXYG12864J LCDs is deciphered by single-chip microcomputer PIC16F687 in the unit interval.The utility model overtemperature protection is relatively to realize by A/D value and program self-temperature set point that program cycle detects 2 accurate integrated temperature sensor TMP36 voltage correspondences that single-chip microcomputer RC4, RC5 mouth connect; 2 TMP36 transducers are close to IGBT pipe fin respectively and the armature winding is installed, their output voltage with temperature with 10mV/C ° of linear change; When single-chip microcomputer detects RC4 or RC5 mouth voltage A/D value and surpasses the A/D value that the single-chip microcomputer self-temperature sets, single-chip microcomputer RC3 mouth is high level output by normal low transition under program control, this level is added to the SD pin of drive circuit IR2113, forces three tunnel outputs (UH, VH, WH) to be turn-offed rapidly; This moment single-chip microcomputer RC2 mouth also output duty cycle be the 50%/f=1Hz pulse, connect this human hair combing waste light pipe flicker expression overtemperature protection.

。Be worth till the required rotating speed; Simultaneously, system can preserve this parameter automatically.The utlity model has that efficient height, starting torque are big, power because of type by the AC-DC-AC frequency translation, digital motor body is operated in: f=200Hz, f _PWM=19KHz, armature winding improves greatly than the direct power supply current of electric of power frequency density, so motor can done forr a short time with the constant power lower volume.Experiment showed, that the digital motor volume can be accomplished 1/2 of conventional asynchronous processing industry frequency converter under the same electric index.If do not consider power factor (PF) emphasizer circuit cost, digital motor adds the stepless speed-regulating device ratio that industrial frequency transformer is formed with the conventional asynchronous motor: cost reduces by 50% approximately; Adjust motor speed, only need to rotate the multiturn potentiometer on the control panel or press " rotating speed+" on the panel, " rotating speed-" button till LCD shows required rotating speed; Simultaneously, system can preserve this parameter automatically, and is easy to operate, has certain market value.

The above only is preferred embodiment of the present utility model, and all equalizations of being done according to the utility model claim change and modify, and all should belong to covering scope of the present utility model.

Claims

1. a digital motor comprises the metal shell with band fixed installation hole and radiating ribs; It is characterized in that: be provided with the magneto body in the described metal shell, the left and right end portions of described magneto body rotor is arranged with bearing and electric motor end cap respectively successively; One side of described magneto body rotor right end portion electric motor end cap is provided with the cooling fan housing, is provided with the high-voltage brushless electric machine controller in the described cooling fan housing and is installed in heat radiation fan blade on the magneto body rotor shaft; Described metal shell end face is equipped with the terminal box of dismantled and assembled band rotating speed demonstration and rotating speed controlled function panel.

2. digital motor according to claim 1, it is characterized in that: described magneto body is by the rare earth permanent-magnet steel rotor of no excitation loss, the amorphous alloy stator iron core of tape insulation support, on behalf of the latch Hall sensor of rotor-position, armature winding on the iron core and 3 of being contained in the stator core slot form.

3. digital motor according to claim 1 is characterized in that: described high-voltage brushless electric machine controller comprises the DC-DC reduction voltage circuit, APFC circuit, the brushless electric machine control circuit that LB11824M forms; Described brushless electric machine control circuit is connected with switching tube drive circuit of being made up of 3 road IR2113 and the three phase bridge circuit of being made up of 6 IGBT in turn; The power input of described three phase bridge circuit is connected with the output of described APFC circuit.

4. described digital motor according to claim 3 is characterized in that: described high-voltage brushless electric machine controller further comprises radiator, and described radiator is installed on the IGBT pipe of the switching tube of APFC circuit and three phase bridge circuit.

5. digital motor according to claim 3; it is characterized in that: described high-voltage brushless electric machine controller further comprises protective circuit; described protective circuit is by overvoltage, under-voltage windows detecting circuit; overcurrent sample, testing circuit are installed in the temperature sensor on the IGBT switching tube and the temperature sensor that is installed on the armature winding is formed.

6. digital motor according to claim 1 is characterized in that: the single chip circuit that the terminal box of described band rotating speed demonstration and rotating speed controlled function panel is made up of PIC16F687, and LCDs, rotating speed control is adjusted panel and is formed.