CN102843014A

CN102843014A - Piston magnetic mutual power type direct current motor

Info

Publication number: CN102843014A
Application number: CN2012103531253A
Authority: CN
Inventors: 兰敦臣
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-09-21
Filing date: 2012-09-21
Publication date: 2012-12-26

Abstract

The invention relates to a pure electric automobile electric power drive direct current motor. The direct current motor is a novel direct current electric power drive mode, has the characteristics of reasonable structure, easiness in processing and assembly, simpleness in maintenance, stable and reliable performance. The direct current motor comprises a coil, a piston, a sensor, a connecting rod, a crank shaft and the like, and outputs the power via the interaction of a coil electromagnet and a piston permanent magnet. The direct current motor can be widely applied in the drive field of pure electric automobiles, and provides a novel power mode for promoting the continuous driving mileage capability of the pure electric automobiles.

Description

The mutual power formula of piston magnetic DC motor

Technical field

What the present invention relates to is that a kind of pure electric automobile electric power is executed DC motor.

Background technology

The development pure electric automobile must be resolved the key technology of two importances: battery technology, Motor Drive and control technology thereof.

Battery is the power producer of electric automobile, also is to restrict one of electric automobile development key factor always.Electric automobile can be competed with fuel-engined vehicle mutually, one of crucial will develop exactly that energy height, power are big, the high-efficiency battery of long service life.Up to the present, battery for electric automobile has passed through three generations's development, has obtained breakthrough.

Motor and drive system are electric automobiles Critical component, also be one of key technology., make electric automobile that good serviceability is arranged, drive motors should have that speed-regulating range width, rotating speed are high, detent torque is big, volume is little, quality is little, efficient is high and characteristic such as the strong and energy feedback of dynamic brake is arranged.At present, electric automobile adopts motor to mainly contain four types of DC motor (DCM), induction motor (IM), permanent magnet brushless electromotor (PMBLM) and switched reluctance motors (SRM) etc.Still in development, also do not obtain breakthrough.

The shortcoming of DC motor (DCM) is that mechanical commutator is arranged, and commutator face can produce spark when operation under the high speed heavy load, so the running speed of motor can not be too high.Because the commutator of DC motor need maintain, and is not suitable for again running up, and except that compact car, does not generally adopt at present.

Induction motor (IM) shortcoming is that drive circuit is complicated, and cost is high, and starting torque is little, starting current is big, motor will produce big torque by the increase starting current, but limits because of battery behavior, and battery is difficult to the electric current that provides big, has influenced the lifting of motor torque.This electric efficiency is low, control is complicated, energy feedback poor performance.The disadvantage of switched reluctance motor (SRM) is that torque pulsation is big, and noise is big; In addition, relative magneto, power density and efficient are on the low side; Another shortcoming is to want the use location transducer, has increased structural complexity, has reduced reliability.

Permanent magnet brushless electromotor (PMBLM) shortcoming is that motor is originally complicated than induction motor when high-speed cruising, needs to detect position of magnetic pole, and the controller ratio has brush DC motor complicacy.At present to be that the continual mileage ability does not also reach round-the-clock for the bottleneck of restriction pure electric automobile development.The heart that the vehicle towed motor of high density, high efficiency, wide range speed control and control system thereof are electric automobile is again one of key technology of development raising continual mileage ability, remains the emphasis of research and development.

For a long time; More than the structure and even the shape of four types of DC motors adopt stator, rotor traditional approach always; Its development and exploitation receive the restriction of multiple factors such as volume, weight, cost, power density, conversion efficiency, torque control, torque variation, overload magnification, have delayed its research and development process to a certain extent.Its development direction is outside taking into account above-mentioned multiple factor, develops under constant electric current and voltage effect, produces the DC motor that continues strong impetus, reaches the purpose that improves round-the-clock continual mileage.

Existing technology mainly adopts stator winding rotor magneto, or stator permanent magnet rotor winding type, in order to remove brush, adopts power supply to pass through inverter power supply.

Existing technical disadvantages:

1. total receives volume. the restriction of weight, will manage significantly to improve supply voltage if want to reduce volume and weight.

2. the traditional type DC motor is in the textural restriction that receives volume and groove volume, and coil turn is limited, has only to promote the purpose that electric current reaches raising power.Under existing voltage and current power supply situation, also do not reach satisfied continual mileage.

3. will make electric automobile that good power and serviceability are arranged, wide to the claimed range of motor, drive motor should have speed-regulating range width, high, the characteristics such as detent torque is big, volume is little, quality is little, efficient height of rotating speed.

4. inverter and control circuit are complicated.

Summary of the invention

One. the purpose of invention.

The present invention seeks to try hard to a kind of breakthrough to traditional dc motor structure pattern, provide a kind of simple and reasonable, dependable performance is stable, and the novel direct-current motor that powerful is strong reaches the purpose that improves continual mileage.

Another goal of the invention of the present invention is to open the pure electric automobile development space, lets the research and development of pure electric automobile step substantive paces, advances pure electric automobile practicability, commercialization, family oriented development process.

Two. the technical solution of invention.

The object of the invention mainly is to be achieved through following technical proposals.

The mutual power formula of described piston magnetic DC motor, its structure is by two iron-core coils for two strokes, two metal non-magnet materials such as aluminium alloy body; A bent axle; Two strong magnetic pistons, two Hall elements, output driving control system six parts constitute.

Iron core in said two coils is selected nonmetal Ferrite Material for use, by output driving circuit bidirectional, dc is provided during work, produces alternating magnetic field, and strong magnetic piston is produced mutual attraction and repulsion.

Said two strong magnetic pistons pass through connecting rod interlock bent axle under the effect of mutual attraction and repulsion in the steel body, pump transmitting power.

Said two Hall elements are positioned at the two ends up and down of steel body, the position of the strong magnetic piston motion of detection at any time, and in time transmit detection signal to input driving circuit.

Said input driving circuit according to the detection signal that Hall element transmits, is in time controlled output driving circuit and is carried the direct current of alternate to two iron-core coils, and then produces alternating magnetic field.Another effect of input driving circuit is an inbound pacing control pin pedal information, through the different power of output driving circuit control piston output.

Usually the number of turn of the power of DC motor output and coil with flow through becoming to amass and being directly proportional of coil current, the traditional type DC motor is in the textural restriction that receives volume and groove volume, coil turn is limited, has only the lifting electric current to reach the purpose of raising power.And the mutual power formula of piston magnetic DC motor can reduce the electric current outputting power through increasing coil turn, and then reaches the purpose that improves continual mileage.

Through the said structure design, make the present invention can reach aforementioned goal of the invention.

Three, the effect of invention.

The present invention has following advantage:

1. it is that a kind of brand-new direct current power is executed the dynamic model formula, has characteristics rational in infrastructure, that process and assemble easy, maintenance is simple, stable and reliable for performance.

2. can seamlessly contact with coil at the structure aspects piston, can increase coil turn, reduce the electric current outputting power, and then reach the purpose that improves continual mileage.

3. because its structure approaches fuel engines, and extension stroke like four-stroke-cycle, many strokes etc., can be developed pure electric automobile easily, also can develop the oil electric mixed dynamic automobile and become and be more prone to.

4. from a structural point, existing automobile mature technology can be transplanted fully, and like control system, gearbox etc. can reduce development cost.

5. on performance, can adopt the gearbox mature technology, reduce characteristic motor requirement speed-regulating range width, rotating speed are high, detent torque is big.

6. Drive and Control Circuit is fairly simple, and cost is low.

7. for the continual mileage ability that improves pure electric automobile a kind of brand-new dynamic mode is provided.

Accompanying drawing and Brief Description Of Drawings:

Accompanying drawing 1 is the mutual power formula of a piston magnetic DC motor cross-sectional view

Accompanying drawing 2 is output driving control system circuit block diagrams

In the accompanying drawing 11 is coil, can require to select the copper enamelled wire coiling of different size to form according to supply power voltage value and power.Select nonmetal Ferrite Material for use in order to reduce whirlpool damage iron core.In the accompanying drawing 12 is pistons, selects high temperature strong magnetic steel of ndfeb material for use.In the accompanying drawing 14 is structure fixed mounts, is the metal magnetic conducting material, and be not only fixing but also play the effect of magnetic conduction.In the accompanying drawing 18 is steel bodies, selects the metal non-magnet material for use.In the accompanying drawing 13 is transducers, is positioned at steel body two ends up and down.In the accompanying drawing 15 is connecting rods.In the accompanying drawing 16 is bent axles.In the accompanying drawing 17 is structure magnet steel carriages.

Accompanying drawing 2 is output driving control system circuit block diagrams, and it is by motor and control motor output driving circuit, input driving circuit, sensor detection circuit four parts composition.Power supply is from electric energy management system, and accelerator pedal information is from master control system.

Embodiment:

Pass through embodiment below, and combine the mutual power formula of piston magnetic DC motor cross-sectional view accompanying drawing 1, output driving control system circuit block diagram accompanying drawing 2, the structure of the present invention and the course of work are done to describe further:

In the accompanying drawing 11 is coil, can require to select the copper enamelled wire coiling of different size to form according to supply power voltage value and power.Select nonmetal Ferrite Material for use in order to reduce whirlpool damage iron core.In the accompanying drawing 12 is pistons, selects high temperature strong magnetic steel of ndfeb material for use.In the accompanying drawing 18 is steel bodies, selects the metal non-magnet material for use.In the accompanying drawing 13 is transducers, is positioned at steel body two ends up and down.When piston 2 is positioned at steel body lower end; Following end sensor output detection signal is given input driving circuit, flows into direct current in the same way by input driving circuit control output driving circuit to a coil; The coil two ends produce and the same verticity of piston, and two magnets produce mutual suction.What then flow into to another coil is reverse direct current, the coil two ends produce with piston on the contrary to magnetic polarity, two magnets produce mutually exclusive power, move through piston drivening rod and bent axle with this.Otherwise, when piston 2 is positioned at steel body upper end, by last end sensor output detection signal; Give input driving circuit; Send into reverse direct current by input driving circuit control output driving circuit to a coil, the coil two ends produce and the piston reverses direction magnetic polarity, and two magnets produce mutually exclusive power.What then flow into to another coil is direct current in the same way, the coil two ends produce identical with piston to magnetic polarity, two magnets produce the power of attracting each other, effect is lucky opposite with said process, has so just accomplished the motion that goes round and begins again.

Through the said structure design and the course of work, make the present invention can reach aforementioned goal of the invention.

Claims

1. a piston structure mode dc motor is characterized in that described structure, is to contain coil, piston, transducer, connecting rod, bent axle.

2.., it is characterized in that described coil is iron core or magnetic core like power 1 described piston structure mode dc motor, be positioned at the upper end of steel body, what coil flowed into is the bidirectional, dc electric current.

3.., it is characterized in that described piston adopts high temperature strong magnetic steel of ndfeb material, is connected with bent axle through connecting rod like power 1 described piston structure mode dc motor.

4.., it is characterized in that described transducer is to be Hall element, is positioned at the two ends up and down of steel body like power 1 described piston structure mode dc motor.

5. like power 1 described piston structure mode dc motor, it is characterized in that described working method.

6. like power 1 described piston structure mode dc motor, it is characterized in that described output driving control system control mode.

7. like power 1 described piston structure mode dc motor, it is characterized in that described material has different selections.