What is the name of the DC motor speed...

🔍 Key Concepts

• Identify that figure A shows a 3‑phase AC motor mechanically driving a DC generator, which in turn supplies a DC motor • Remember the classic DC speed control system that uses an M‑G set (motor‑generator set) to vary the DC motor’s armature voltage via the generator field • Contrast this with more modern systems that use solid‑state (thyristor) rectifiers without a rotating DC generator

💭 Think About

• Look at how the DC motor in figure A receives its power: is it coming directly from rectified AC, or from a separate DC generator driven by an AC motor? • Which historical DC speed control system is best known for using an AC motor, DC generator, and controlled generator field to vary the DC motor’s speed? • Among the choices, which name is associated with an older, rotating machinery type of control system rather than an electronics manufacturer or specific brand of converter?

✅ Before You Answer

• Verify that the circuit in figure A includes a 3‑phase AC motor mechanically coupled to a DC generator (M‑G set) feeding the DC motor armature • Confirm that speed is controlled by adjusting the field of the DC generator, not by directly chopping or rectifying the armature supply with solid‑state devices • Match the method’s description: classic motor‑generator DC speed control system — then choose the option historically linked to that system name

What is the name of the DC motor speed control method utilized as shown in figure "A" of the illustration? Illustration EL-0101

Ward-Leonard

Atlas-Copco

Burmeister-Wain

Sperry-Rand

🔍 Key Concepts

💭 Think About

✅ Before You Answer