how does the rated wattage of a motor affect range? : r/ebikes
Short answer, higher wattage = lower range. Long answer, it depends. Amps × Voltage is Watts, not Watt-hours. If you have a battery of 1 Wh, which is Volts x Amp-hours, then you
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HOME / How much higher is the battery rated current than the motor - PROTON POWER
Short answer, higher wattage = lower range. Long answer, it depends. Amps × Voltage is Watts, not Watt-hours. If you have a battery of 1 Wh, which is Volts x Amp-hours, then you
No, the battery itself can deliver much more current than 1A, but the boost converter (3.7V -> 5V) can only do so much. Higher current means higher heat, and that heat can start a fire or melt the wiring. Drawing the maximum rated
What do the golf cart motor ratings (e.g. 4kw or 5kw) refer to? I looked up Navitas documentation for their 5kW motor model, and its includes a chart that graphs its power output at ~5kw at higher rpms, and slightly higher up to 7.5kw at lower rpms. 5kw or even 7.5kw is so much lower than the rated power on the controllers (Navitas: 600a @ 72v).
Matching your motor voltage and your battery voltage cannot be understated if you want your setup to even work, let alone cause serious damage. If your motor is rated at 36v, get a 36v battery and so on. Getting a 72v battery and a 48v motor will likely fry your electronics located in the motors controller.
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
The 1500w motor running full power and the same all-out throttle as the 500w motor will use more battery getting up to speed from every stop, and use more battery per mile cruising at a higher speed. Exactly how different will depend hugely on user input, maybe more than anything else. Then, bigger motor is heavier.
Meaning that if a motor draws 10A in a 24V battery and controller system, in a 48V system when 10A pass through the motor the voltage to the motor would be identical than in a 24V system (since the resistance of the windings is the same and current =
The ONLY real effect the higher C rated battery will have is to make the model heavier, not cause a big increase in current. Some years ago, the lower-C rated batteries could limit the current, but newer batteries have much lower IR now and, at around 60A, that wasn''t happening, since the OP was only drawing a bit over 15C from the 40C battery.
The previous XR model had a 750 W motor, and about a 324W/h battery. The new GT has a ~50% bigger battery and a higher voltage but still the specs say it''s a 750W motor. They are also marketing elsewhere on their website as 3 Hp,
IF the battery power in volts matches the motor voltage rating (in my case 48V), and IF the battery ah is a tad less than the ah calculation of the motor (48V 1000watt...1000/48 = 20.83amp), how much can it overheat the
From my understanding of my previous question, the voltage coming from the battery through the motor will be around 9v. The current will be from 0amps to however much
I have a 48 volt, 20 kW motor that I need to supply with power. I am looking at a configuration of 16 LiFePo4 cells each in series, each 200 Ah rated at 1 C. At that rated capacity, it would seem...
Based on the power equation this means that the motor current can (and typically will) be much higher than the input current of the motor controller. The reason for this is that the permanently PWM adapted motor voltage (depending on speed
In Li-Ion world, it is common to see a battery rated 5C, 20C, 30C and it can have two ratings - for short-term and for long term (as if 30C discharge can be long term,)
For instance, a 3000mAh battery rated at 1C will provide 3000mAh over one hour. If you''re dealing with lead-acid batteries, they''re often rated much slower, like 0.05C (a 20-hour rate). If you can''t find the C Rating on the label or data sheet, check with the manufacturer or, better yet, call a battery expert—they''ll have the answers (and maybe some jokes about
A properly sized battery should have a discharge current rating that meets or exceeds motor current-input requirements. Other battery considerations for motor
If the battery voltage is higher than the rated motor voltage then you can reduce top rpm by limiting the throttle to less than 100%, but the speed controller must still be able to handle the full motor current (which with a PWM controller will be higher than the battery current).
Inrush current is higher due to the startup current generally being Vin / Rmot before the motor starts spinning. Same Rmot, higher Vin, higher peak driver requirements. Motor torque needs to be reduced as well in order for this to
You can use our motor current calculator to work out how mechanical load affects motor current. The effect of the above is that the motor current into a sufficiently loaded
Since diesel has 22:1 compression ratio the start torque is much higher than a car at 8:1. The proper way to choose a starting battery depends on the Battery/Motor ESR ratio under any condition as any drop in battery voltage
A higher AH rating will equate to longer range and extended battery life. The controller current rating should be comfortably higher than the motor''s maximum current draw.
Both the ESC and battery should be rated for higher Amps than the actual current the motor draws in your application. It may draw up to ~5 times higher current at startup or when a load is initially applied, but ESCs are usually rated to handle these momentary current
The C rating does not change. All the C rating gives you is the maximum amount of constant current that you can draw from the battery before you cook it. If you overprop a 10 Amp motor, power it with a 20C battery and draw 20 Amps, the motor may flame-out but the battery will be OK.
And because the energy is coming from a capacitor, the instantaneous current can be much higher than the continuous current capability of the battery. Going with the assumption that phase current is about 3x the actual battery current (I haven''t seen this validated, but it seems reasonable as a rule of thumb), 200 A of phase current would imply 67ish A of
It''s quite obvious that we would want to avoid this scenario at all cost. To reduce the ripple voltage within the ESC and maximize reliability of the ESC, select the highest C rated batteries that you can. In the image above,
Voltage: The voltage indicates the electrical potential difference provided by the battery. Higher voltage outputs mean more potential energy available. For instance, a 12-volt battery delivers higher energy than a 6-volt battery when connected to the same load.
The starting current of the induction motor is about six times the motor''s full-load current. An induction motor rating of 11 KW,22 Amps,440 volts takes a high starting current of about 132
Despite your protest that you understand that "a motor/component only draws as much current as it needs," you don''t understand that "a motor/component only draws as
They aren''t going to last very long, especially since a motor is an inductive load. You need relays rated for at least 14A inductive load. In practice a motor can draw a much larger current when starting up, than when running. So don''t even assume that the maximum current draw is 14A. Your little 7Ah battery isn''t going to last very long either.
Because the controller is able to convert voltage to current, in effect, it is possible to have a much higher current flowing to the motor, at a lower voltage, than flows from the battery to the controller. The phase current is the current that the FETs carry, so it''s not a great idea to set this too high. the rated current (together with
A BLDC motor is an inductor juat like a brushed DC motor. The controller should have a current limiter on each phase output, so it will not damage the motor. Why do you think that a 60V bus voltage will harm a 26V motor? The rated voltage is just the voltage at the maximum rated speed, due to back EMF. It''s not the insulation rating.
Having a higher rated esc will not affect the motor. Over propping is what burns up a motor. May 18, 2012, 08:09 PM #6; Both the ESC and your batteries should have higher current ratings than the current draw of the motor. The ESC cannot limit the amount of current. it is the best way to know your prop and battery choice isn''t over
The esc should be higher than the motor, the batteries should be higher than the esc. then have the battery able to supply more current than the esc can handle. The motor will only draw the current it wants, even if the battery can supply 10 times as much. Aug 09, So say the esc is rated at 100amps and compatible with 2-4 cell lipos.
The maximum rated current may be 1 C, but it can be much higher. It depends on the battery. Li-poly batteries used in RC models are often rated at 20 C or higher. I would guess a power tool battery would be rated at >10 C, i.e. you could drain your drill in <6 minutes at full torque.
In general, the faster the motor speed, the smaller the current; the slower the motor speed, the greater the current. Current, voltage is a dynamic balancing process. When
I have a 60A rated BMS, with a 1500W motor, 2000W motor controller, and I plan on running 13S 6P, for a 48 volt battery. It should necessarily be a smaller value than the maximum current the battery can supply. Your batteries can almost always output much more than they''re rated for - so for me, this is Preferred. (smaller BMS than
Discussion Confused about current draw in battery-esc-motor chain Electric Power Systems
I have a motor for a submersible pump with a Rated Current of 8.4A as given in the motor''s electrical data. However, when it is running, I record a current of 3.4-3.9A. Is there a fault I am supposed to look into, or is this normal? Why is the
Based on the power equation this means that the motor current can (and typically will) be much higher than the input current of the motor controller. The reason for this is that the permanently PWM adapted motor voltage (depending on speed and torque) is lower than the fixed supply voltage (of a battery or power supply).
The motor voltage is always lower than the supply voltage. and depends on the speed and back-EMF of the motor. The motor current is typically much higher than the current provided by the power supply or battery. Please note the attached PDF which holds this information formatted for print-out.
The current will be from 0amps to however much the battery can supply without frying. What decides how much current goes through the motor? The current will decrease with speed; the more force there is trying to slow the motor down, the slower it will go and the more current it will draw.
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.
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.
The batteries should be rated for the same or higher (continuous) current than the ESC, which should in turn be rated for a significantly higher current than the motor. The rule of thumb is: Never draw any more current than whatever you're drawing it from can supply. Also, motors can draw more current than they should.