Why does the armature reaction in a DC motor occur in the opposite direction of the main flux and not in the same direction?
Why does armature reaction shift mna in the direction opposite to the rotation of the motor in a dc motor?
In a d.c series motor how does the speed increase when the armature current decreases? Does terminal voltage effect direction of rotation of dc motor? Why does a DC motor rotation change when the battery is reversed? Why does the rotor of an induction motor rotates in the direction of stator magnetic field? What do you mean by phase difference and phase shift in an AC motor? Why does the rotor rotate in a three phase induction motor? What will happen to the LED which is connected directly to the DC Motor when a shaft of the DC motor is rotated in reverse direction? What is direct and quadrature axis in AC motors? What changes have to be made to make AC motor a DC motor or vise versa? How do I change the direction of an AC motor? Should there be a balance between both magnetic fields of stator and armature in a PM DC motor for proper operation of the motor? If so, what is the effect of unbalanced magnetic fields? How will motor react to frequencies other than 50 Hz or 60 Hz? Electrical Machines: A synchronous motor is connected to an infinite bus, slowly field current are being reduced and made to zero. It was again increased but with opposite polarity. How armature current of motor will fluctuate? How can we change the direction of a DC motor? What determines which way an induction motor rotates? Why is torque not generated in a 3-phase transformer, whereas it is generated in an induction motor? Internal angle of synchronous motor? Torque of DC motor and its unit? Why is the armature winding of three phase alternators generally placed in the stator? How is torque produced in a 3 phase induction motor? How can a single phase motor be reversed? What is the difference between induction motor and synchronous motor in terms of armature winding and field winding? Can we use asynchronous or synchronous counter to control the rotation of motor? How does voltage and phase of an electric motor are related? How does a spindle motor differ from induction motor? How can one reverse the rotation of a AC motor? Which motor has high starting torque AC or DC? Explain about v and inverted curves of synchronous motor? How is a synchronous motor used for power factor correction? How is it operated at max efficiency? How does a motor cycle works?