This part of Book 2 is about elevator drives, the prime mover of all traction elevators. It consists of seven chapters. Besides the main content, which is the original article published in an edition of Elevator World, each chapters comes with a tutorial where certain points within the article are further elaborated on or clarified to help readers understand the content more through. The derivation of equations is included in the tutorials, which is mainly for the interest of those who love mathematics. Readers often don't need to fully understand the derivation to understand the content of the article sand attempt assessment questions. Then, there are learning reinforcement questions for each chapter. No model answer is offered to the learning reinforcement questions, but readers are welcome to write to us for further discussion.
At the end of each section, there are assessment examination questions that readers who want to get the appropriate CEUs must attempt and submit to Elevator World. Readers must pick one out of five choices as the answer of each assessment examination question. Though there may be more than one correct choice of each question, readers must select the best answer out of five.
This test covers the following chapters from Section 2.1 - Elevator Drives:
Chapter 1 - Energy is Force x Distance
Chapter 2 - Modern VVVF Drives
Chapter 3 - An Introduction to PM Gearless Motors and Drive Control Systems
This test is worth 3 Contact Hours (0.3 CEUs). There are 20 questions on this test and you will have 60 minutes to complete. This exam may only be taken online. 80% is a passing grade. You will know immediately if you have passed or failed. If you pass, you will be able to immediately print your certificate. If you fail, you will be instructed to pay a retake fee in order to retake the exam.
