An oversized car battery will not harm your starter motor. A higher capacity battery, with more amp-hours (AH) or cold cranking amps (CCA), is safe if it maintains a voltage of 12 volts, which is standard for modern cars. Larger batteries, like those used in diesel equipment, can also work as long as the voltage stays proper.
If it is a smart battery and the motor draws more amps than it can provide, some sort of overcurrent protection might kick in and the motor will not run. If it's a plain chemical battery with no fuses or BMS, the 20 amps figure likely is the battery's rated current.
Exceeding the rated current of a battery can lead to several issues. The battery is likely to heat up more due to the increased power loss through internal resistance, which is proportional to the square of the current.
Over voltage. The windings in the coil have an insulation rating that will fail if the voltage is high enough causing arcing and again, burn out. Further, the brushes will arc more at higher voltages causing heat and faster wear. Over speed. DC motors are not the best mechanical beasts in the world.
There will always be a dip in battery volts whilst the motor is running. It's possible that the beefier the battery, the less of a dip - which will mean more current flowing. I can understand the mechanic's reaction to the fault, even though I / we don't actually agree with his theory.
If a motor draws more amps than a battery can provide, the battery is likely to heat up more. This is due to the power lost through internal resistance, which is proportional to the square of the current. In your example, the current is 125% of the rated current, resulting in heating power that is 156% of the nominal power deemed acceptable by the designers.
The starter motor on a vehicle pulls hundreds of amps for a short period of time from the car battery. Although the voltage dips, the battery isn't damaged. Several factors determine whether damage occurs, primarily the heat generated in the motor and/or the battery. Car batteries are rated for this.
An oversized car battery will not harm your starter motor. A higher capacity battery, with more amp-hours (AH) or cold cranking amps (CCA), is safe if it maintains a voltage of 12 volts, which is standard for modern cars. Larger batteries, like those used in diesel equipment, can also work as long as the voltage stays proper.
You could use 10C, 25C, 50C battery, and the current flowing through the motors would be (approximately) the same, as long as it does not exceed the maximum current allowed for the battery (82 Amps in your case) As a side note - I find it hard to believe, that there is no maximum current defined in the motor driver datasheet. It is the key ...
If it''s a brushed DC motor, it''s fine within reason if you''re using a current controlled power supply (which will also make increased inrush current a non issue). Going too high voltage could …
The rest of the driving voltage (maybe 10 or 20%) is dropped across the motor''s winding resistance, resulting in two effects : enough torque to turn the unloaded motor that fast, and heating the motor, by I^2R watts. You …
Definitely no. 8000mAh battery most likely can deliver 40+ amps of current (properly done 8000mAh LiPo battery can deliver 160 amps, you can easily buy them in RC hobby area). But I bet that even wires attached to the battery inside won''t handle 40 amps - and what is really limiting current is DC-DC converter which takes battery 3.0...4.2 varying voltage on the input …
Both scenarios are potentially hazardous. In the first case, the internal resistance in the battery will probably reduce the current sufficiently to prevent damage to the motor, but the battery may be damaged. In the second case, the internal battery resistance will not reduce the motor current sufficiently tp prevent damage to the motor. Some ...
Many people are confused of the concept of battery current and motor current, what''s exactly they are? and what''s the difference. Here comes detail explanations. The relationship between power &voltage ¤t: P=UI, U is voltage, I is current, if the voltage keep the same, the power is become bigger as the current become bigger. The relationship …
After all that has been seen, the answer is simple: if we double the voltage, the current intensity would also increase twice and we would run the risk of burning or damaging everything that is connected to the battery.
Because the motor voltage is always lower than the battery voltage, but the power is the same, then the current is higher. If the controller PWM was 20%, then the motor …
A motor drive usually has a current limit circuit to prevent over current during stall conditions. So if you have a small motor and you run it from a car battery you could blow it up if it stalls.
So, the ratio between motor amps and battery amps changes based on RPM. The motor max limit is important for low RPM otherwise your motor can burn out. You should set this to whatever your motor is rated for. The battery amp max limit is important to make sure you don''t draw too many amps from your battery pack or into the VESC. From what I ...
An oversized car battery will not harm your starter motor. A higher capacity battery, with more amp-hours (AH) or cold cranking amps (CCA), is safe if it maintains a …
Current capability of a battery (25C) has nothing to do with that how much current will it actually source. It is the load (motors in that case) what defines the current, not the battery. You could use 10C, 25C, 50C battery, and the current flowing through the motors would be (approximately) the same, as long as it does not exceed ...
$begingroup$ Thanks @Wes, this is what I was looking for. To confirm, in a simple working circuit with various components, and I doubled the voltage, but also doubled the resistance so the current remained the same, …
As long as you don''t load the the motor so that the current stays below the overheating threshold you will be fine. Also, it takes some time for the heat to build up so …
motor''s draw current (at a fixed voltage) based on ONE variable, the motor winding impedance. if the motor is say 24 volts, it will draw locked rotor current at start-up. This current will decrease as the motor speeds up, because of counter emf. This is good, the motor would burn up if it drew locked rotor current for longer than a little while.
After all that has been seen, the answer is simple: if we double the voltage, the current intensity would also increase twice and we would run the risk of burning or damaging everything that is …
A larger battery can supply more current over time, which is essential for starting engines with higher demands. Starter motors often require a significant burst of …
A larger battery can supply more current over time, which is essential for starting engines with higher demands. Starter motors often require a significant burst of current, usually ranging from 100 to 200 amps, depending on the engine size and temperature. This requirement can exceed the capabilities of smaller batteries.
Because the motor voltage is always lower than the battery voltage, but the power is the same, then the current is higher. If the controller PWM was 20%, then the motor voltage would be 20V and the current 50A, for the same 1kW of power.
If a starter motor receives too much current, it can overheat and potentially burn out the motor''s windings or damage other components such as the solenoid or starter relay. …
Current increases only to the extent the load (or motor mechanical losses) require higher torque at higher speed. The current increase can be nearly insignificant or drastic depending on load characteristics. If the current is < rated at rated voltage because the load doesn''t require the full motor capability, current may not exceed ...
The quantity of heat P dissipated in a wire is given by $$ P = I^2R $$ where I is the current and R is the resistance of the wire (not load resistance). So yes, excessive resistance and high current both contribute to heat production. This is true for AC and DC. For AC or any kind of variable load, I should is the root mean square of the current.
Current capability of a battery (25C) has nothing to do with that how much current will it actually source. It is the load (motors in that case) what defines the current, not the battery. You could use 10C, 25C, 50C battery, and …
Example 1 has a runtime of 1.92 hours.; Example 2 shows a slightly longer runtime of 2.16 hours.; Example 3 has a runtime of 1.44 hours.; This visual representation makes it easier to compare the different battery runtimes under varying conditions. As you can see, the runtime varies depending on factors like battery capacity, voltage, state of charge, depth of …
Both scenarios are potentially hazardous. In the first case, the internal resistance in the battery will probably reduce the current sufficiently to prevent damage to the …
If a starter motor receives too much current, it can overheat and potentially burn out the motor''s windings or damage other components such as the solenoid or starter relay. What are the signs of a damaged starter motor due to excessive current?
Make sure you run the motor at less than 13A (624W) and you''ll be OK. If the motor controller can''t do this current limit, find something which can. (13A or 15A breaker?) If I don''t limit the current, and the motor runs at full power, what will happen to the battery? "33A brushless DC 2000w 48v" - Is it this one?
This scenario can happen with or without the vehicle even on. Fortunately most all circuits are protected with fuses in case an accidental short to ground causes battery current (amps) to flow through the circuit. If bad voltage, too high or too low, causes damage it will normally be the battery that takes the brunt of it. Batteries will buffer ...
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