Current is the rate of the flow of charge per second through a material to which a specific voltage is applied. Cosφ = power factor of the three phase induction motor. We have a big shop fan with a 115v 1/2 HP electric motor. Figure 2 Motor Power Factor (as a Function of % Full-Load Amperage) Overloaded motors can overheat and lose efficiency. It will run continuously on the bench under no load. I am not sure of the make of the engine but I suspect that it is a Tecumsah. Batteries are fully charged and in good condition. I then pushed the accelerator pedal and monitored the voltage at B- and M-, the more I pushed the lower the voltage dropped." In electrical systems, voltage is the force required to move electrons. I checked the voltage between the B- and the M- on the speed control module and it was at Battery voltage (36V). Example : We have 1 unit Induction Motor with 30 horsepower (hp),running with 34.9 amps for amperage load and 460 volts 3 phase and power factor value is 0.75 and motor efficiency is 85% A motor with a high number of parallel circuits, that is, four and eight wye, will show less power loss when one circuit is open. if the motor is wired for 460, running on 230, that WILL lose power. The remaining power i.e (input electrical power – stator losses) are supplied to rotor as rotor input. I bought it new on 12/04/1997 and have not ever stored it with gas stabilizer but I change the oil each year. Many motors are designed with a service factor that allows occasional overloading. Electrical motor loads are calculated from power in kW and full rated load in kW.Following is the formula how to calculate Motor loads. Be careful when you are handling the batteries or the motor as it could cause burns or injuries if done incorrectly. If the capacitor has failed the symptom is that the motor won't start. I believe I can replicate the issue in order to drain the batteries, then charge it and start again. A microhmmeter is used to identify this problem. Service factor is a multiplier that indicates how much a motor can be overloaded under ideal ambient conditions. Under normal load the motor will run more slowly and will overheat. How to Fix a Golf Cart that Loses Power Quickly. You may hear it humming or observe that it's getting hot. The above-mentioned techniques usually solve the issue in most of the cases. Electric motor starting & run capacitor troubleshooting FAQs Questions & Answers about Electric Motor Start-Boost or Run Capacitors Capacitors are electric devices that get an electric motor running at start-up or that help keep a motor running once it has started. Last winter it would run but stall under any snow load. It may be possible for some motors to have a connection come loose and have at least one winding effectively drop out. usually that is something that you would know about. On lightly loaded motors with easy-to-start loads, reducing the voltage will not have any appreciable effect, except that it might help reduce the light load losses and improve the efficiency under … Electrical power input to the stator, P in = √3V L I L cosφ A part of this power input is used to supply stator losses which are stator iron loss and stator copper loss. Step on the pedal and it takes off quickly; goes just like new for about 100 yds., then loses power and limps back. Sometimes you might have had this happen to your golf cart. Similarly, the motor's pullout torque would be much lower than it would be under normal voltage conditions. @mmcconn2 all this "when I initiate the load test they move toward the weak range. 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