CN2507186Y

CN2507186Y - Driving device for single phase brushless dc motor

Info

Publication number: CN2507186Y
Application number: CN01259558U
Authority: CN
Inventors: 彭文清; 武思刚
Original assignee: XIANGBAO ELECTRIC MACHINE PLANT CO Ltd ZHUHAI CITY
Current assignee: XIANGBAO ELECTRIC MACHINE PLANT CO Ltd ZHUHAI CITY
Priority date: 2001-08-27
Filing date: 2001-08-27
Publication date: 2002-08-21
Anticipated expiration: 2011-08-27

Abstract

A driving device for a single-phase brushless direct current motor of the utility model comprises a position detect circuitry, a logic control circuit, and a switch circuit, wherein the position detect circuitry can detect the magnet pole position of the single-phase brushless direct current motor via a Hall element and output position signals, the logic control circuit can accept the position signals and output control impulses via the output end, the switch circuit can accept the control impulses and change the magnet pole position of a runner through changing the current flow direction in order to rotate the runner. The utility model has the advantages that the circuit structure is reasonable, can drive a brushless direct current motor with high power, and has stable work and high performance.

Description

The drive unit of brushless single phase direct current machine

The utility model relates to a kind of drive unit of brushless single phase direct current machine.

At present, be applied to the drive circuit of brshless DC motor, generally constitute by position signalling generating apparatus, inverter circuit, controller with DC excitation, perhaps constitute by position signalling generating apparatus (or each phase end detecting device of rate signal, voltage signal checkout gear), pulse generator, counter, control the motor rotation of inner rotor by these means, above-mentioned means, complex structure is realized comparatively difficulty.

The purpose of this utility model, provide a kind of designs simplification the brushless single phase direct current machine drive ground state device so that the smooth working of brushless single phase direct current function.

The utility model comprises position detecting circuit, detects the position of magnetic pole and the outgoing position signal of brushless single phase direct current machine by Hall element; Logic control circuit is accepted position signalling, and by the output output control pulse; Switching circuit is accepted control impuls, by the position of magnetic pole of conversion current direction change rotor, makes the rotor rotation.

The utility model circuit structure is reasonable, can drive powerful brshless DC motor, and working stability is functional.

Accompanying drawing 1 is the utility model electricity theory diagram;

Accompanying drawing 2 is the utility model embodiment 1 electrical schematic diagram;

Accompanying drawing 3 is the utility model embodiment 2 electrical schematic diagrams.

As shown in Figure 1, the utility model comprises position detecting circuit, detects the position of magnetic pole and the outgoing position signal of brushless single phase direct current machine by Hall element; Logic control circuit is accepted position signalling, and by the output output control pulse; Switching circuit K accepts control impuls, by the position of magnetic pole of conversion current direction change rotor, makes the rotor rotation.

In embodiment one (see figure 2), position detecting circuit is made of Hall element H, and logic control circuit is made of not gate A, inverter A ', inverter B, and switching circuit is by triode (Q _1`Q ₅) constitute, the output of inverter A ' is first output of logic control circuit, the output of inverter B is second output of logic control circuit, is connected with switching circuit respectively.Behind the electrical power, power supply V _CCAdd to position detecting circuit, just can produce a position signalling, export 2 pin of NAND gate A to, may be low level, also may be high level by Hall element H.Be assumed to be low level, NAND gate A then because 1 pin is a high level, its output 3 pin are high level, this high level send 1 ' pin of inverter A ', through anti-phase be low level, this low level makes triode Q ₃End triode Q ₁Also end, but the low level of inverter A ' output becomes high level after inverter B is anti-phase, the high level of inverter B output by 4 pin through R ₅Deliver to triode Q ₄, make triode Q ₄Conducting, triode (Q ₅, Q ₂) conducting, electric current is flowed through from earth terminal b, and winding W, a hold, triode Q ₂To V _M-End.There is electric current to flow through in the winding, then produce magnetic field, the action of a magnetic field of this magnetic field and rotor makes the rotor rotation, variation has taken place in position, rotor rotation back, change in location is detected by position detecting circuit (Hall element), just exports a high level by Hall element H, and this high level is delivered to 2 pin of NAND gate A, 1 pin is connected to high level, NAND gate A output 3 pin output low levels become high level after inverter A ' is anti-phase, by its 2 ' pin through resistance R ₂Send triode Q ₃, make triode Q ₃Conducting, triode Q ₁Conducting, simultaneously, the high level of inverter A ' output send inverter B, becomes low level after inverter B is anti-phase, and this low level is through resistance R ₅Send triode Q ₄, make triode Q ₄End triode (Q _s, Q ₂) also end, electric current is from V _M+Bring out and send out, through Q ₁, a end, winding W be to earth terminal b, the electric current of the winding W that flows through commutates.The electric current that flows through among the winding W becomes alternating current like this, produces alternating magnetic field thus, and rotor rotates under action of alternating magnetic field.

In embodiment two (see figure 3)s, its principle is identical with example one, and position detecting circuit is by Hall element H ₁Constitute, logic control circuit is by chip IC ₁Constitute, switching circuit is by triode (Q _1`Q ₁₀) constitute position detecting circuit (Hall element H ₁) position signalling that detects send logic

control circuit IC

₁2,4 pin.IC ₁After obtaining position signalling,, make and establish 7 human hair combing waste Continuity signals (high level) by the signal that 7 pin, 8 pin send conducting respectively and end, 8 human hair combing waste pick-off signals (low level), then the high level of 7 pin makes triode (Q ₂, Q ₄, Q ₅, Q ₆, Q ₈) conducting, the low level of 8 pin makes triode (Q ₁, Q ₃, Q ₇, Q ₉, Q ₁₀) end, electric current is from V _M+Bring out and send out, through triode Q ₈, D end, winding W, C end, triode Q ₅To V _M-End flows through electric current and produces magnetic field among the winding W, act on the rotor field, makes the rotor rotation.The rotor rotation, change in location, Hall element H ₁Signal after changing, logic control circuit IC ₁Obtain promptly changing behind this signal the signal that 7 pin, 8 human hair combing wastes go out, become 7 human hair combing waste low levels, 8 human hair combing waste high level, the low level of 7 pin makes triode (Q ₂, Q ₄, Q ₅, Q ₆, Q ₈) end, the high level of 8 pin makes triode (Q ₁, Q ₃, Q ₇, Q ₉, Q ₁₀) conducting, electric current is from V _M+Bring out and send out, through triode Q ₃, C end, winding W, end D, triode Q ₁₀To V _M-End, electric current commutates among the winding W.Like this, flow through alternating current among the winding W, produce alternating magnetic field, the rotor field successively rotates under action of alternating magnetic field, and motor moves.

Claims

1, a kind of drive unit of brushless single phase direct current machine is characterized in that comprising position detecting circuit, detects the position of magnetic pole and the outgoing position signal of brushless single phase direct current machine by Hall element; Logic control circuit is accepted position signalling, and by the output output control pulse; Switching circuit is accepted control impuls, by the position of magnetic pole of conversion current direction change rotor, makes the rotor rotation.

2, the drive unit of brushless single phase direct current machine according to claim 1 is characterized in that position detecting circuit is made of Hall element H, and logic control circuit is made of not gate A, inverter A ', inverter B, and switching circuit is by triode (Q _1`Q ₅) constitute, the output of inverter A ' is first output of logic control circuit, the output of inverter B is second output of logic control circuit, and is connected with switching circuit respectively, behind the electrical power, power supply V _CCAdd to position detecting circuit, just can produce a position signalling, 2 pin by Hall element H exports NAND gate A to may be low level, also may be high level, be assumed to be low level, NAND gate A then is because 1 pin is a high level, its output 3 pin are high level, this high level send 1 ' pin of inverter A ', through anti-phase be low level, this low level makes triode Q ₃End triode Q ₁Also end, but the low level of inverter A ' output becomes high level after inverter B is anti-phase, the high level of inverter B output by 4 pin through R ₅Deliver to triode Q ₄, make triode Q ₄Conducting, triode (Q ₅, Q ₂) conducting, electric current is flowed through from earth terminal b, and winding W, a hold, triode Q ₂To V _M-End has electric current to flow through in the winding, then produce magnetic field, the action of a magnetic field of this magnetic field and rotor, make the rotor rotation, variation has taken place in position, rotor rotation back, and change in location is detected by the position detecting circuit Hall element, just export a high level by Hall element H, this high level is delivered to 2 pin of NAND gate A, and 1 pin is connected to high level, NAND gate A output 3 pin output low levels, after inverter A ' is anti-phase, become high level, by its 2 ' pin through resistance R ₂Send triode Q ₃, make triode Q ₃Conducting, triode Q ₁Conducting, simultaneously, the high level of inverter A ' output send inverter B, becomes low level after inverter B is anti-phase, and this low level is through resistance R ₅Send triode Q ₄, make triode Q ₄End triode (Q ₅, Q ₂) also end, electric current is from V _M+Bring out and send out, through Q ₁, a end, winding W be to earth terminal b, the electric current of the winding W that flows through commutates.

3, the drive unit of brushless single phase direct current machine according to claim 1 is characterized in that position detecting circuit is by Hall element H ₁Constitute, logic control circuit is by chip IC ₁Constitute, switching circuit is by triode (Q _1`Q ₁₀) constitute position detecting circuit Hall element H ₁The position signalling that detects send logic control circuit IC ₁2,4 pin.IC ₁After obtaining position signalling,, make and establish 7 human hair combing waste Continuity signal high level by the signal that 7 pin, 8 pin send conducting respectively and end, 8 human hair combing waste pick-off signal low levels, then the high level of 7 pin makes triode (Q ₂, Q ₄, Q ₅, Q ₆, Q ₈) conducting, the low level of 8 pin makes triode (Q ₁, Q ₃, Q ₇, Q ₉, Q ₁₀) end, electric current is from V _M+Bring out and send out, through triode Q ₈, D end, winding W, C end, triode Q ₅To V _M-End flows through electric current and produces magnetic field among the winding W, act on the rotor field, makes the rotor rotation, rotor rotation, change in location, Hall element H ₁Signal after changing, logic control circuit IC ₁Obtain promptly changing behind this signal the signal that 7 pin, 8 human hair combing wastes go out, become 7 human hair combing waste low levels, 8 human hair combing waste high level, the low level of 7 pin makes triode (Q ₂, Q ₄, Q ₅, Q ₆, Q ₈) end, the high level of 8 pin makes triode (Q ₁, Q ₃, Q ₇, Q ₉, Q ₁₀) conducting, electric current is from V _M+Bring out and send out, through triode Q ₃, C end, winding W, end D, triode Q ₁₀To V _M-End, electric current commutates among the winding W.