CN114337379A

CN114337379A - Design scheme applied to series motor and utilizing double-side stator excitation winding to stop and brake

Info

Publication number: CN114337379A
Application number: CN202111503156.8A
Authority: CN
Inventors: 陈诚
Original assignee: A BETTER ELECTRICAL MANUFACTURING (SHENZHEN) CO LTD
Current assignee: A BETTER ELECTRICAL MANUFACTURING (SHENZHEN) CO LTD
Priority date: 2021-12-09
Filing date: 2021-12-09
Publication date: 2022-04-12

Abstract

The invention provides a design scheme for a series excited motor to utilize bilateral stator excitation winding to stop and brake, which comprises wire harnesses W1, W2, W3, W4, a stator winding A, a stator winding B and a motor armature winding M, wherein the stator winding A and the stator winding B are connected in series, two ends of the stator winding A and the stator winding B are respectively connected with W1 and W3, two ends of the positive pole and the negative pole of the motor armature winding M are respectively connected with W2 and W4, when the motor is electrified and operated, the W1 and the W2 are electrified, the W3 and the W4 are conducted, the motor is operated, when the machine meets an emergency uncovering condition, the W1/W2 is powered off through switch switching, the W1 and the W4 are conducted, the W2 and the W3 are conducted, the stator winding A, the stator winding B and the armature winding M are connected in series to form a closed loop, the closed loop generates reverse current under the excitation of a residual magnetic field of the armature winding of the series excited motor, the closed loop forms reverse torque, and leads the motor to stop the operation and brake rapidly, the braking function is realized. The invention greatly shortens the braking time, has better braking effect, and saves more cost because the motor only needs to be connected with four outgoing lines.

Description

Design scheme applied to series motor and utilizing double-side stator excitation winding to stop and brake

Technical Field

The invention relates to the technical field of motors, in particular to a design scheme for stopping and braking by utilizing a bilateral stator excitation winding, which is applied to a series excited motor.

Background

At present, along with the improvement of the living quality level of people, the food processor is more dependent on machine processing in the aspect of food processing, so that the safety requirement on the food processor is higher and higher, when the food processor works, the food processor is in special conditions, for example, an operator mistakenly opens a cup cover, the stirring cutter driven by a motor is required to stop running at once at the moment, personal injury is avoided, the machine needs to stop rotating within 1.5 seconds after the cover is opened according to the national standard, and the popular explanation is a braking function. At present, the food processor adopting the series motor on the market is designed to brake by mostly utilizing a unilateral stator excitation winding, and the principle of the food processor is that the back electromotive force is generated by utilizing the rotation inertia of a rotor after the motor is powered off through the conversion of a wiring switch in the instant of opening a cover, so that the acting force opposite to the original rotation direction is generated, and the rotation of the rotor is prevented. However, the back electromotive force and the back acting force generated by the single-side stator exciting winding are limited, the braking time of the motor is long and may even exceed 1.5 seconds, and personal injury may be caused.

The common design principle diagram for braking by using the unilateral stator exciting winding is shown in the attached figures 4-6 of the specification, when the motor is electrified and operated, W1 and W2 are electrified, W3 and W4 are conducted, and the motor is operated;

when the machine is in an emergency cover opening condition, the switch is switched, the W1 is powered off, the W1 and the W4 are conducted, the W3 and the W5 are conducted, the stator winding A and the rotor form a closed loop, and an opposite acting force is generated by utilizing the rotation inertia of the rotor to realize a braking function.

Traditional braking scheme, the motor need connect five lead-out wires and realize braking function, and the pencil is loaded down with trivial details.

Therefore, it is desirable to design a design scheme for a series excited machine using a double-sided stator field winding shutdown brake to solve the above-mentioned problems.

Disclosure of Invention

The invention aims to provide a design scheme for stopping and braking a series excited motor by using a bilateral stator excitation winding, which can greatly shorten the braking time and achieve a better braking effect.

In order to achieve the purpose, the invention is realized by the following technical scheme: a design scheme for stopping and braking a series excited motor by using a bilateral stator excitation winding comprises wire harnesses W1, W2, W3, W4, a stator winding A, a stator winding B and a motor armature winding M, the stator winding A and the stator winding B are connected in series, two ends of the stator winding A and the stator winding B are respectively connected with W1 and W3, two ends of the positive pole and the negative pole of the motor armature winding M are respectively connected with W2 and W4, when the motor is electrified and operated, the W1 and the W2 are electrified, the W3 and the W4 are conducted, the motor is operated, when the machine is in an emergency opening condition, through switching, the power of W1/W2 is cut off, W1 and W4 are conducted, W2 and W3 are conducted, a stator winding A, a stator winding B and an armature winding M are connected in series to form a closed loop, the closed loop generates reverse induced current under the excitation of a residual magnetic field of an armature winding of the series excited motor to form reverse torque, so that the motor is rapidly stopped to brake, and the braking function is realized.

Preferably, the stator winding a and the stator winding B are excitation windings.

The invention provides a design scheme for stopping and braking a series excited motor by utilizing a bilateral stator excitation winding. The method has the following beneficial effects:

1. according to the invention, the two excitation windings of the stator of the series excited motor are connected in series to the closed braking loop, so that the braking function by using the excitation windings of the double-side stator is realized, the reverse torque generated by the double-side excitation windings is twice that of the single-side excitation windings, the braking time can be greatly shortened, and the braking effect is better.

2. In addition, the motor can realize the braking function only by connecting four outgoing lines, and compared with the traditional five outgoing lines, the motor saves cost and has higher cost performance.

Drawings

FIG. 1 is a schematic diagram of the motor wiring circuit of the present invention;

FIG. 2 is a schematic diagram of the wiring circuit for the motor operation of the present invention;

FIG. 3 is a schematic diagram of the motor brake wiring circuit of the present invention;

FIG. 4 is a schematic diagram of a prior art motor wiring circuit;

FIG. 5 is a schematic diagram of a prior art motor operation wiring circuit;

fig. 6 is a schematic diagram of a prior art motor brake wiring circuit.

Detailed Description

The invention is further described with reference to the following drawings and detailed description:

in the description of the present invention, it should be noted that the terms "top", "bottom", "one side", "the other side", "front", "back", "middle part", "inside", "top", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1-6, a design scheme applied to a series excited motor for stopping and braking by using a bilateral stator field winding includes wire harnesses W1, W2, W3, W4, a stator winding a, a stator winding B and a motor armature winding M, and is characterized in that the stator winding a and the stator winding B are connected in series and both ends of the stator winding a and the stator winding B are respectively connected with W1 and W3, both ends of a positive pole and a negative pole of the motor armature winding M are respectively connected with W2 and W4, when the motor is powered on, the W1 and the W2 are powered on, the W3 and the W4 are switched on, the motor runs, when the machine encounters an emergency cover opening situation, the W1/W2 is powered off, the W1 and the W4 are switched on, the W2 and the W3 are switched on, the stator winding a, the stator winding B and the armature winding M are connected in series to form a closed loop, and a residual magnetic field of the armature winding is used to generate reverse current to form a reverse torque to stop and brake the motor rapidly, the braking function is realized.

Specifically, according to the design scheme, the two excitation windings of the stator are connected in series into a braking closed loop, the function of braking by using the excitation windings of the bilateral stator is achieved, the reverse torque generated by the excitation windings of the bilateral stator is twice that of the excitation windings of the unilateral stator, the braking time can be greatly shortened, and the braking effect is better.

In addition, the motor can realize the braking function only by connecting four outgoing lines, and compared with the traditional five outgoing lines, the motor saves cost and has higher cost performance.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various changes, modifications and substitutions can be made without departing from the spirit and scope of the invention as defined by the appended claims. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A design scheme for stopping and braking a series excited motor by utilizing a bilateral stator excitation winding comprises wire harnesses W1, W2, W3, W4, a stator winding A, a stator winding B and a motor armature winding M, and is characterized in that the stator winding A and the stator winding B are connected in series, two ends of the stator winding A and the stator winding B are respectively connected with W1 and W3, two ends of a positive pole and a negative pole of the motor armature winding M are respectively connected with W2 and W4, when the motor is electrified and operated, the W1 and the W2 are electrified, the W3 and the W4 are conducted, the motor operates, when the motor meets an emergency uncovering condition, the W1/W2 is powered off through switching, the W1 and the W4 are conducted, the W2 and the W3 are conducted, the stator winding A, the stator winding B and the armature winding M are connected in series to form a closed loop, and the closed loop generates reverse current under the excitation of a residual magnetic field of the armature winding of the series excited motor, so as to form reverse torque and rapidly stop and brake the motor, the braking function is realized.

2. The design scheme of the series excited machine for stopping and braking by using the bilateral stator excitation winding according to claim 1 is characterized in that: the stator winding A and the stator winding B are excitation windings.