Materials that will not carry current readily are known as insulators. Should one of the brushes happen to have a hard spot, a groove may be worn into the commutator. For example, a motor with a low starting torque is not suitable for use with a machine that requires a high torque to start and bring up to speed. We welcome your comments and suggestions. These bars are firmly attached to rings of low-resistance metal at both ends.
For this reason some sort of thermal device of a capacity matching that of the motor it is to protect is as the motor. I made a lead drawing to save my brain and did some figuring with a continuity meter. The belt is probably the most common means of transmitting energy from a motor to its load. The electric current is usually conducted to the coils of the stator from an external circuit, but is frequently induced in the coils of the rotor by changes in the magnetic flux linkage due to the varying currents in the stator windings. On applying power for the first time no load , the motor groaned and turned slowly.
If the electrical connections of a series motor are changed so that they are like those shown in figure 17, B, the motor is a repulsion motor and will run only on alternating current. The drying temperature should not be in excess of 190° F. The current cannot be conducted to the rotor but must be induced in the windings by the changing magnetic field. Pullevs for flat belts are faced with a slight crown at the middle, which increases centrifugal force there, causing the belt to creep in from the ends and to stay on. The speed regulation is somewhat under the control of the designer; if practically constant speed is required, the motor can be designed accordingly.
This action will decrease the field strength on the side of the conductor where the flux lines are in opposite directions and increase them on the side where the lines are in the same direction. A wiring diagram is usually used to troubleshoot troubles and making certain that the connections have actually been made which every little thing exists. They will have the same resistance if measured with an ohm meter, in the 3 to 10 or so ohm range. Keywords for Century Electric Motor Parts Diagram :. If the motor is to be connected to the load by means of a belt, consideration must be given to methods of maintaining proper belt tension.
In case any such places are found the winding should be cleaned and repaired. This load becomes less as operating speed is approached, which is just the opposite of the starting characteristic of the centrifugal pump. Circuitry diagrams will certainly also consist of panel timetables for breaker panelboards, and riser representations for special services such as fire alarm or closed circuit tv or other unique services. You can easily leave your review as feed back to our web site quality. This motor does have thermal overloads which L2 goes over to. For this reason a motor should be inspected occasionally to see if the insulation is worn off the conductors at any place, if there are any burned places where current has been taking short cuts, or if there is excessive accumulation of dirt or oil on the windings that might cause local heating. It should never be assumed that a starting winding is burned out until the bearings have been tested.
In the motor illustrated here the centrifugal mechanism, a, is at the end opposite the commutator. Larger motors have switches or other control devices of ample current-carrying and breaking capacity. These pulleys are made of cast iron, pressed steel, or die-cast alloy. Since the red lead goes to one side of the centrifugal switch and the brown lead to the other side, I assumed that red was one speed and brown was the other. These protective devices are not intended to protect the circuit carrying current to the motor. For example: In a single-phase system but one current flows, while in a three-phase system three currents flow.
If a motor is properly mounted on a solid support, the only wear on the bearings will be that due to the weight of the rotating part and the force of the pull of the belt. If the motor is used for several jobs it may be desirable to resort to a quicker way of tightening the belt. Phantom View Series Type Single Phase Motor Figure 7 is another phantom view in which the motor is shown as a part of an electric hand drill. About Image brief description: Image has been submitted by Brenda Botha and has been tagged by category in field. This voltage is sufficient to send current through the rotor windings and produce a starting torque to start the motor. Although the starting winding carries only a small current, it will overheat if allowed to remain in the circuit for more than a few seconds or minutes at most.
Conductor—Any substance through or along which electricity may flow readily. Set the motor where it will not be in the way. Century Electric Motor Wiring Diagram Marathon Motors For In Blurts Building circuitry representations show the approximate locations and interconnections of receptacles, lights, and irreversible electrical services in a building. To find out most photographs within Century Electric Motor Wiring Diagram images gallery remember to comply with. Laminated construction is necessary in magnetic circuits where alternating currents are involved. It also acts as a fan.