T
Hi,
I am thinking about desgning a high speed flywheel UPS. There are flywheel UPS's about on the market but these are all industrial units which can supply hundreds of kilowatts for only a few seconds.
I wish to make a flywheel UPS which can supply a smaller current (say 3KW max) but for a much longer period of time by storing a lot of energy.
I was wondering how to go about experimenting. Obviously I could use a standard DC motor as it will work as a generator when not on mains power however with the high speeds the brushes will not last long. So then I thought of AC induction motors. These can be controlled with an inverter but I'm not sure whether they will operate as a generator when at high speeds. I have seen induction motors used as generators buty they need to be run at their rated speed ie. 3000rpm for 50Hz because when you move away from this speed the motor stops generating.
So I am wondering about brushless DC motors as the best alternative? But can these be used as motor generators too or just as a motor? Does anyone have any experience in this?
Thanks for you help and ideas!
Tim
I am thinking about desgning a high speed flywheel UPS. There are flywheel UPS's about on the market but these are all industrial units which can supply hundreds of kilowatts for only a few seconds.
I wish to make a flywheel UPS which can supply a smaller current (say 3KW max) but for a much longer period of time by storing a lot of energy.
I was wondering how to go about experimenting. Obviously I could use a standard DC motor as it will work as a generator when not on mains power however with the high speeds the brushes will not last long. So then I thought of AC induction motors. These can be controlled with an inverter but I'm not sure whether they will operate as a generator when at high speeds. I have seen induction motors used as generators buty they need to be run at their rated speed ie. 3000rpm for 50Hz because when you move away from this speed the motor stops generating.
So I am wondering about brushless DC motors as the best alternative? But can these be used as motor generators too or just as a motor? Does anyone have any experience in this?
Thanks for you help and ideas!
Tim