Motors & Controllers - Revision history

Cstubbs: /* Hoverboards */

2026-05-12T16:33:00Z

Hoverboards

← Older revision		Revision as of 16:33, 12 May 2026
Line 82:		Line 82:
	Although the motors are only rated at 350W each, some experimentaton with the PCBs showed they will briefly tolerate peaks up to 1.4kW, but catastrophicaly fail at 1.6kW.		Although the motors are only rated at 350W each, some experimentaton with the PCBs showed they will briefly tolerate peaks up to 1.4kW, but catastrophicaly fail at 1.6kW.

	It is possible to fit pneumatic tyres and brakes to the 6.5" hub motors with some careful modifications. See Wheels & Tyres page.		It is possible to fit pneumatic tyres and brakes to the 6.5" hub motors with some careful modifications. See [[Wheels & Tyres]] page.

Cstubbs: /* Hoverboards */

2026-05-12T16:32:28Z

Hoverboards

← Older revision		Revision as of 16:32, 12 May 2026
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	Although the motors are only rated at 350W each, some experimentaton with the PCBs showed they will briefly tolerate peaks up to 1.4kW, but catastrophicaly fail at 1.6kW.		Although the motors are only rated at 350W each, some experimentaton with the PCBs showed they will briefly tolerate peaks up to 1.4kW, but catastrophicaly fail at 1.6kW.

	It is possible to fit pneumatic tyres to the 6.5" hub motors with some careful modifications. See Wheels & Tyres page.		It is possible to fit pneumatic tyres and brakes to the 6.5" hub motors with some careful modifications. See Wheels & Tyres page.

Cstubbs: /* Flyback diode */

2025-04-22T12:08:27Z

Flyback diode

← Older revision		Revision as of 12:08, 22 April 2025
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	=== Flyback diode ===		=== Flyback diode ===
	[[File:FLYBACKDIODE.png\|thumb]]		[[File:FLYBACKDIODE.png\|thumb]]
	~~This~~ section is currently up for review, as diodes can often fail short and would bypass fuse protection. Maybe ~~a reverse polarity fuse across the motor controller rather than fuse would~~ be ~~a better idea~~, unless they are very robustly rated?		'''Note: this section is currently up for review, as diodes can often fail short and would bypass fuse protection. Maybe this should not be universally recommended, unless they are very robustly rated?'''
	When the fuse supplying a Brushless DC motor and its controller blows, it can sometimes result in damage to the controller due to voltage spikes caused by the sudden interruption of current flow. This is particularly problematic in inductive systems like motors, where the collapsing magnetic field can generate high-voltage transients. These transients may exceed the voltage ratings of components within the controller, leading to failure. A simple and effective protective measure is to connect a flyback or freewheeling diode across the fuse. This diode is oriented in reverse bias during normal operation but provides a safe path for the current generated by inductive kickback when the fuse blows, thereby clamping the voltage spike and protecting sensitive electronics downstream. Note that it is not allowed to use a diode in forward bias to conduct any traction current in parallel with the fuse ~~is not allowed~~, as this would give an unfair performance advantage.		When the fuse supplying a Brushless DC motor and its controller blows, it can sometimes result in damage to the controller due to voltage spikes caused by the sudden interruption of current flow. This is particularly problematic in inductive systems like motors, where the collapsing magnetic field can generate high-voltage transients. These transients may exceed the voltage ratings of components within the controller, leading to failure. A simple and effective protective measure is to connect a flyback or freewheeling diode across the fuse. This diode is oriented in reverse bias during normal operation but provides a safe path for the current generated by inductive kickback when the fuse blows, thereby clamping the voltage spike and protecting sensitive electronics downstream. Note that it is not allowed to use a diode in forward bias to conduct any traction current in parallel with the fuse, as this would give an unfair performance advantage.

Cstubbs: /* Flyback diode */

2025-04-22T11:48:52Z

Flyback diode

← Older revision		Revision as of 11:48, 22 April 2025
Line 51:		Line 51:

	=== Flyback diode ===		=== Flyback diode ===
			[[File:FLYBACKDIODE.png\|thumb]]
	This section is currently up for review, as diodes can often fail short and would bypass fuse protection. Maybe a reverse polarity fuse across the motor controller rather than fuse would be a better idea, unless they are very robustly rated?		This section is currently up for review, as diodes can often fail short and would bypass fuse protection. Maybe a reverse polarity fuse across the motor controller rather than fuse would be a better idea, unless they are very robustly rated?
	When the fuse supplying a Brushless DC motor and its controller blows, it can sometimes result in damage to the controller due to voltage spikes caused by the sudden interruption of current flow. This is particularly problematic in inductive systems like motors, where the collapsing magnetic field can generate high-voltage transients. These transients may exceed the voltage ratings of components within the controller, leading to failure. A simple and effective protective measure is to connect a flyback or freewheeling diode across the fuse. This diode is oriented in reverse bias during normal operation but provides a safe path for the current generated by inductive kickback when the fuse blows, thereby clamping the voltage spike and protecting sensitive electronics downstream. Note that it is not allowed to use a diode in forward bias to conduct any traction current in parallel with the fuse is not allowed, as this would give an unfair performance advantage.		When the fuse supplying a Brushless DC motor and its controller blows, it can sometimes result in damage to the controller due to voltage spikes caused by the sudden interruption of current flow. This is particularly problematic in inductive systems like motors, where the collapsing magnetic field can generate high-voltage transients. These transients may exceed the voltage ratings of components within the controller, leading to failure. A simple and effective protective measure is to connect a flyback or freewheeling diode across the fuse. This diode is oriented in reverse bias during normal operation but provides a safe path for the current generated by inductive kickback when the fuse blows, thereby clamping the voltage spike and protecting sensitive electronics downstream. Note that it is not allowed to use a diode in forward bias to conduct any traction current in parallel with the fuse is not allowed, as this would give an unfair performance advantage.
	~~[[File:FLYBACKDIODE.png\|thumb]]~~

Cstubbs at 11:48, 22 April 2025

2025-04-22T11:48:36Z

← Older revision		Revision as of 11:48, 22 April 2025
Line 53:		Line 53:
	This section is currently up for review, as diodes can often fail short and would bypass fuse protection. Maybe a reverse polarity fuse across the motor controller rather than fuse would be a better idea, unless they are very robustly rated?		This section is currently up for review, as diodes can often fail short and would bypass fuse protection. Maybe a reverse polarity fuse across the motor controller rather than fuse would be a better idea, unless they are very robustly rated?
	When the fuse supplying a Brushless DC motor and its controller blows, it can sometimes result in damage to the controller due to voltage spikes caused by the sudden interruption of current flow. This is particularly problematic in inductive systems like motors, where the collapsing magnetic field can generate high-voltage transients. These transients may exceed the voltage ratings of components within the controller, leading to failure. A simple and effective protective measure is to connect a flyback or freewheeling diode across the fuse. This diode is oriented in reverse bias during normal operation but provides a safe path for the current generated by inductive kickback when the fuse blows, thereby clamping the voltage spike and protecting sensitive electronics downstream. Note that it is not allowed to use a diode in forward bias to conduct any traction current in parallel with the fuse is not allowed, as this would give an unfair performance advantage.		When the fuse supplying a Brushless DC motor and its controller blows, it can sometimes result in damage to the controller due to voltage spikes caused by the sudden interruption of current flow. This is particularly problematic in inductive systems like motors, where the collapsing magnetic field can generate high-voltage transients. These transients may exceed the voltage ratings of components within the controller, leading to failure. A simple and effective protective measure is to connect a flyback or freewheeling diode across the fuse. This diode is oriented in reverse bias during normal operation but provides a safe path for the current generated by inductive kickback when the fuse blows, thereby clamping the voltage spike and protecting sensitive electronics downstream. Note that it is not allowed to use a diode in forward bias to conduct any traction current in parallel with the fuse is not allowed, as this would give an unfair performance advantage.
			[[File:FLYBACKDIODE.png\|thumb]]

Cstubbs at 11:47, 22 April 2025

2025-04-22T11:47:43Z

← Older revision		Revision as of 11:47, 22 April 2025
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	<youtube>B0NfceGIjMA</youtube>		<youtube>B0NfceGIjMA</youtube>

			{{clear}}

			=== Flyback diode ===
			This section is currently up for review, as diodes can often fail short and would bypass fuse protection. Maybe a reverse polarity fuse across the motor controller rather than fuse would be a better idea, unless they are very robustly rated?
			When the fuse supplying a Brushless DC motor and its controller blows, it can sometimes result in damage to the controller due to voltage spikes caused by the sudden interruption of current flow. This is particularly problematic in inductive systems like motors, where the collapsing magnetic field can generate high-voltage transients. These transients may exceed the voltage ratings of components within the controller, leading to failure. A simple and effective protective measure is to connect a flyback or freewheeling diode across the fuse. This diode is oriented in reverse bias during normal operation but provides a safe path for the current generated by inductive kickback when the fuse blows, thereby clamping the voltage spike and protecting sensitive electronics downstream. Note that it is not allowed to use a diode in forward bias to conduct any traction current in parallel with the fuse is not allowed, as this would give an unfair performance advantage.


	{{clear}}		{{clear}}

Cstubbs: /* Low Battery Cutoff Mod */

2025-01-07T18:53:32Z

Low Battery Cutoff Mod

← Older revision		Revision as of 18:53, 7 January 2025
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	=== Low Battery Cutoff Mod ===		=== Low Battery Cutoff Mod ===
	Video from Russell about altering low battery cutoff voltage on ebike / scooter controllers. Altering one to cut off at a lower voltage may prevent controllers cutting out when the battery dips under high load.		Video from Russell about altering low battery cutoff voltage on ebike / scooter controllers. Altering one to cut off at a lower voltage may prevent controllers cutting out when the battery dips under high load.

	<youtube>B0NfceGIjMA</youtube>		<youtube>B0NfceGIjMA</youtube>

Cstubbs: /* Brushless Motors */

2025-01-07T18:53:25Z

Brushless Motors

← Older revision		Revision as of 18:53, 7 January 2025
Line 39:		Line 39:
	Running backwards? Swap two motor phases. Some controllers may also need hall sensors swapped too, but not all.		Running backwards? Swap two motor phases. Some controllers may also need hall sensors swapped too, but not all.
	Motor not running smoothly? Does your controller have a teach or learn input? That's the easiest route to get it to work. If not, check out the flowchart to the left (credit lsdzs.com).		Motor not running smoothly? Does your controller have a teach or learn input? That's the easiest route to get it to work. If not, check out the flowchart to the left (credit lsdzs.com).

			{{clear}}


			=== Low Battery Cutoff Mod ===
			Video from Russell about altering low battery cutoff voltage on ebike / scooter controllers. Altering one to cut off at a lower voltage may prevent controllers cutting out when the battery dips under high load.
			<youtube>B0NfceGIjMA</youtube>

	{{clear}}		{{clear}}

imported>Cstubbs: /* Hoverboards */

2024-09-09T15:16:40Z

Hoverboards

← Older revision		Revision as of 15:16, 9 September 2024
(No difference)

imported>Cstubbs: /* Hoverboards */

2024-09-09T15:16:40Z

Hoverboards

← Older revision		Revision as of 15:16, 9 September 2024
Line 66:		Line 66:
	Although the motors are only rated at 350W each, some experimentaton with the PCBs showed they will briefly tolerate peaks up to 1.4kW, but catastrophicaly fail at 1.6kW.		Although the motors are only rated at 350W each, some experimentaton with the PCBs showed they will briefly tolerate peaks up to 1.4kW, but catastrophicaly fail at 1.6kW.

	It is possible to fit pneumatic tyres to the 6.5" hub motors with some careful modifications. 4.10/3.50-5 tyres are about the only size which can be [https://twitter.com/EmfRoamer/status/1631357302484631552?cxt=HHwWgICwxdi036MtAAAA made to fit]. A brake from a Xiaomi M365 can also be fitted to the inside wall of the motor with some modification.		It is possible to fit pneumatic tyres to the 6.5" hub motors with some careful modifications. See Wheels & Tyres page.