mibawad

mibawad

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Member since
Jan 24, 2011
Last active
Mar 18, 2015
Total activities
0

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Recent contributions

  1. #Threads

    H-Bridge four quadrant Dc motor driver

    I would like to know if all H-Bridge four quadrant Dc motor driver can regenerate power in braking quadrant.

  2. #Threads

    DC motor efficiency

    Hello, I would like to know if the motor efficiency is changing with respect to applied voltage or it doesn't change. What...

  3. #Threads

    25fb62fa-5a2c-4743-af86-52b72e5c01d9

    All textbooks refer to the speed-torque curve for permanent magnet DC motor as a line in first quadrant as in the figure...

  4. #Threads

    53305c4a-a176-4579-9b15-037c437b4c7e

    Hello, What do you mean by drooping curve? Could you explain more? Best wishes, Mohammed

  5. #Threads

    What will be the shape of torque-speed curve in braking quadrant for DC motor?

    Hello, What will be the shape of torque-speed curve in braking quadrant for DC motor? Will it be similar to this curve?...

  6. #Threads

    8d7e7d87-586a-41ff-9323-a4d098b85417

    What do you mean by "If the voltage is open circuit voltage and the current delivered is limited the battery may not...

  7. #Threads

    d467283e-116f-4851-9f2d-d94ae13c31c8

    Many thanks, for those useful information. I have another question what will happen if I charged 12V battery by 40V source or...

  8. #Threads

    d3d29da7-c9df-45ab-93d9-0ee9e160f8d7

    What do you mean by "What is worse, you may even drain the battery further if a lower voltage source is connected"?...

  9. #Threads

    4ad359e5-b75d-45d9-abfa-c5de3f5bfefb

    Does it mean that I could charge 12V rechargeable battery at 5V for example? And, it will charge, but it might takes...

  10. #Threads

    574fbf97-76d6-4daf-b923-db981b201efc

    Many thanks for your help. I would like to know if the varying in charging current has any effect on battery life...

  11. #Threads

    fa424b52-c107-46f8-9e00-fca62114062a

    Actually, I would like to know if there is a special circuit to charge a battery as the output voltage is varying...

  12. #Threads

    Hand crank generator battery charger circuit

    Hello, I want to use a DC permanent motor as a generator in order to use it to charge a battery. This...

  13. #Threads

    What is the difference between stall torque and braking torque in DC motor?

    Hello, In DC motor specification and data sheet, the stall torque is mentioned. The stall torque is considered as a toque produced...

  14. #Threads

    Voltage controlled resistor

    Hello, I would like to make a variable resistance controlled by voltage in order to get variable resistance for gain. I want...

  15. #Threads

    27e57af7-8125-4885-aa0b-096015d40fc6

    But, there is no supply voltage for generator. It is only in case of DC motor

  16. #Threads

    d820ab6f-3d2a-4ec3-879e-1581126732aa

    @freak Therefore, I couldn't calculate the current and voltage generated from the DC generator without knowing the load as well. Is that...

  17. #Threads

    b366b881-0e22-42c9-a068-c9e41a3899bd

    @freak What I want to say that for DC motor or generator: Emf=V+Ia*Ra+La(di/dt) Emf=K*w If I know K, w, Ra and La,...

  18. #Threads

    f333aef4-8e4a-4a56-a032-a57c9dc0fe02

    Many thanks for your reply. I would to know if I know the generator speed and the resistance and inductance values for...