|
|
The construction of the synchronous motors is essentially the same as the construction of the salient- pole alternator. In fact, such an alternator may be run as an ac motor. It is similar to the drawing in figure 4-6. Synchronous motors have the characteristic of constant speed between no load and full load. They are capable of correcting the low power factor of an inductive load when they are operated under certain conditions. They are often used to drive dc generators. Synchronous motors are designed in sizes up to thousands of horsepower. They may be designed as either single-phase or multiphase machines. The discussion that follows is based on a three-phase design
To understand how the synchronous motor works, assume that the application of three-phase ac power to the stator causes a rotating magnetic field to be set up around the rotor. The rotor is energized with dc (it acts like a bar magnet). The strong rotating magnetic field attracts the strong rotor field activated by the dc. This results in a strong turning force on the rotor shaft. The rotor is therefore able to turn a load as it rotates in step with the rotating magnetic field. It works this way once it’s started. However, one of the disadvantages of a synchronous motor is that it cannot be started from a standstill by applying three-phase ac power to the stator. When ac is applied to the stator, a high-speed rotating magnetic field appears immediately. This rotating field rushes past the rotor poles so quickly that the rotor does not have a chance to get started. In effect, the rotor is repelled first in one direction and then the other. A synchronous motor in its purest form has no starting torque. It has torque only when it is running at synchronous speed. A squirrel-cage type of winding is added to the rotor of a synchronous motor to cause it to start. The squirrel cage is shown as the outer part of the rotor in figure 4-7. It is so named because it is shaped and looks something like a turnable squirrel cage. Simply, the windings are heavy copper bars shorted.
BLDC Motor Ningbo Guanlian Motor Electronic Co.,Ltd is an advanced manufacturer integrating design, production, sales and service. We are specialized in Electric Motors, Electrical Motor, AC Motor, Explosion Proof Motor, Three Phase Motor, Single Phase Motor manufacturer, including Y, Y2, Y3, YD series three phase electrical motor,Single phase motor,Induction motor,Asynchronous motor,Capacitor motor，YC, YL,YY series, MS, ML, MY series asynchronous motor and YB2, YBF2 series explosion-proof three-phase electric motor. We have passed European CE certification, ISO9001:2000, the national CCC mandatory certification, and have export right and also obtained QS、MA、EX certificates.
Our products are exported to many countries and areas such as Spain, Norway, Turkey, Syria, Iran, Malaysia, Vietnam, Colombia and so on.
Our product：Explosion Proof Motor Three-Phase Induction Motor Single-Phase Electric Motor
Single phase capacitor motor YC series
Product Categories: Single-Phase Electric Motor
YC series single-phase capacitor start motors are suitable for small size machine tools and water pumps, especially suitable for family workshops where only single-phase power be supplied. This series motors are designed with the latest technology, manufactured with the quality materials, have following features: good performance, safe and reliable operation, nice appearance, convenient maintenance, meet the IEC standards.
Specifications:
1) Frame size: 80
2) Rated power: 0.37kW
3) Rated voltage: 110 – 120V, 200 – 240V
4) Frequency: 50Hz, 60Hz
5) Protection class: IP44
6) Insulation class: E, B, F
7) Materials: cast iron, aluminum (FRAME 71-132)
 EFF: EFF3, EFF2,
9) Poles: 2, 4, 6
10) Cooling method: IC411 (total-enclosed fan-cooled type)
11) Mounting types: IMB3, IMB35, IMB5, IMB14, IMB34
12) Operating mode: S1
13) Connection: “Y” type for 3kW and downwards, “D” type for 4kW
and upwards
14) Ambient temperature: -35°C< θ <40°C
15) The altitude should be lower than 1,000m above the sea level
16) Relative humidity: not higher than 90%
17) Special motors can be designed according to customers’ requirements
18) Export markets: Europe, North America, the Middle East, Africa, Southeast Asia, East Asia, South America
Inner packing:
Foam box
Outer packing:
Plywood case
Conveyance:
Qty/20′ FCL: 1,800pcs
Popular Products
Single phase electric motor YY series
Single phase capacitor motor YC series
Single phase electric motor YL seris
single phase Electric Motor YL series
Related Searches: single phase motor electrical motor asynchronous motor induction motor ac motor electromotor capacitor motor yc motor electric motors Electric motors Electrical motor Single phase motor AC motor Y2 motor industrial electric motor
Topics related articles：
Electric motors-32-hengye
Electric Motors-24-hengye
explosion proof motor-60-hengye
Welcome to visit:http://www.motor-product.com/
Keywords: DC Motor, AC Motor, DC Gear Motor, BLDC Motor, AC Gear Motor
Excitation mode is the field winding excitation current in receive mode. Share his encouragement, and Lai, SACS, and compounding, compounding compounding another sub-plot and poor compounding.
1, He Li: field winding and armature winding in circuit with each other by two independent DC power Uf and U respectively
Field winding and armature winding power supply, shown in Figure 1-5 (a) shows. Made by the permanent magnets can also be seen as his main pole excitation kind.
If the size of the excitation current as the armature voltage and armature current Ia U and has nothing to do, so as to facilitate control of, If the relative
In Ia, the much smaller, so more exciting winding turns, cross-sectional area smaller.
2, and Li: field winding and armature windings in parallel, U by the same DC power supply, shown in Figure 1-5 (b) below. Due to excitation
Circuit self-contained way, so generally the same with his encouragement, choose a smaller excitation current, excitation winding turns more. In the direct shunt
Flow Motors for: power supply line current I = Ia + If.
3, series excitation: excitation winding and armature winding in series, shown in Figure 1-5 (c) below. Therefore, the DC Motor, the power supply
The line current I, the armature current Ia and the exciting current If is equal, that is I = Ia = If.
As the armature current is high, series excited winding of a large cross-sectional area, number of turns less.
4, Fu Li: both shunt and series excited winding winding called compounding, shown in Figure 1-5 (d) below. Shunt winding and armature winding
Group parallel and then in conjunction with the series excitation winding in series as short compounding, Figure 1-5 (d) as shown in solid line; series excitation winding and armature winding
Series and then in parallel with the shunt winding, corresponding to Figure 1-5 (d) the dotted line, known as the long-compounding.
Short compounding, the flow through the series excitation winding current IS = I; longer compounding time, IS = Ia. But whether it is short or long complex compounding
Li, I = Ia + If.
More noteworthy is that: the magnetic motive force generated by the superposition results are poor product compounding and compounding. If the shunt with wf turn around
Group generated magnetomotive force is Ff = If wf, with ws turn the series excited winding magnetomotive force produced by the Fs = Is ws. Product compounding
Time, Fs Ff direction with the same total excitation MMF ΣF = Ff + Fs; poor compounding time, Fs Ff in the opposite direction with a total
Excitation magnetic motive force ΣF = Ff-Fs. These two forms of DC Motor compounding very different operating characteristics, DC Motor does not
The differential compound excitation; difference Compound Excitation for DC welding machine is used.
Keywords: DC Motor, AC Motor, DC Gear Motor, BLDC Motor, AC Gear Motor
The basic working principle of DC Motor:
Figure 1-6 (a) is a working model for DC Motor. Figure in N and S pole DC stator excitation is generated by constant after
Fixed magnetic field, when the brush between A and B outside the DC voltage applied U, if A brush with the power of “+” very connected, B brush with power “-”
Highly connected, then the icon instantly, external current I A through brush and in contact with them for the films into the winding device abcd, as components
The current ia, ia the direction of the brush from the A → a → b → c → d → B brush. ia and magnetic fields interact to generate electromagnetic force f,
Will be determined under the direction of the left in Figure 1-6 (b) below. Role in the armature of the electromagnetic force tangent circle will have a magnetic switch f
Moment Tem, counterclockwise direction. When the electromagnetic torque Tem is greater than the load torque and load torque T2 and T0 of the time, the electromagnetic torque
Under Tem, n speed by armature to rotate counterclockwise. Meanwhile, the rotation of the armature windings cutting constant magnetic field, electric induction
Momentum e, direction is determined by right hand, and ia the opposite.
Turned 180 ° position, due to changing slice through the brush A still and at the edges of components under the N pole is connected, so from the space
See, ia the direction of change, from A brush → d → c → b → a → B brush, electromagnetic torque Tem is still counter-clockwise, so n
Will remain unchanged. However, relative to the element abcd ia concerned, has changed direction.
Therefore, in making motors DC Motor running, has the following characteristics:
(1) brush between the applied voltage U and I are outside the DC current through the brush for the inverter to the film and the role of each armature
Ia coil current flow into the exchange, the induced electric potential while also exchange e;
(2) components within the EMF and current ia e the opposite direction, so that e for the EMF;
(3) a fixed brush (such as A brush) with only at a certain polarity (N pole) with connection conductors under the magnetic pole. As at 1
Fixed polarity voltage and the current direction of conductor is constant, therefore, generated by the armature current of the magnetic field in space is
Fixed;
(4) electromagnetic torque Tem role play drive, that is n and Tem in the same direction, so long as the motor for continuous external
To power, the motor will have constant torque Tem to drive production machinery or equipment. However, there is only one component
6
Motor, it generates a ripple of electromagnetic torque. So the actual motor to open in the circumference of the surface even more slots, slots
Stood a lot of components built to the proceeds of the electromagnetic torque Tem is basically unchanged.
and three-phase permanent magnet synchronous motor control principle is similar to a given command signal added to the AC servo system input, the motor shaft position feedback signal and compared to a given position, according to results of the comparison control servo movement, until it reaches the until the required position. PM, SM, and BLDCM Type II servo system constitutes the basic idea is the same.
In comparison, two kinds of permanent magnet brushless motors, BLDC Motor has a square-wave control of a simple, low cost, simple test device, the system is relatively easy to achieve them and so on. But the square-wave DC Gear Motor principle inherent defects, because the armature current and armature magnetic flux in the non-moving continuity of the presence of electromagnetic pulse, which pulse noise generated when running at high speed in the medium and low speed is stable torque-driven major obstacle. Torque ripple motor speed control features have made it worse, thus limiting the composition of the Square by BLDC Motor servo system in high-precision, high-performance requirements of the application of servo-driven situations (especially in low-speed direct-drive occasions). Therefore, the general performance of the electric servo drive control system, use square-wave BLDC Motor and the corresponding control mode. The PM, SM servo system requirements for the stator three-phase sinusoidal input current, can get better smoothness, with superior low-speed servo performance. Which is widely used in CNC machine tools, industrial robots and other high-precision servo drive system.
|
|
