Rumors have persisted for years that a “Second Edition” or “Revised Edition” was released in the late 1980s by a smaller UK publisher. However, archival research confirms that while Jones published several research papers updating his theory, no official new edition of the book was ever released before his death. Therefore, a "new" PDF likely refers to a superior-quality scan of the original 1967/1973 editions.
Yes. But with a caveat.
If you are an undergraduate cramming for a basic machines exam, Jones is too much. You will drown in the matrix algebra. Stick to Chapman or Fitzgerald.
If you are a graduate student, a researcher, or a controls engineer designing hardware-in-the-loop (HIL) simulators: The Unified Theory of Electrical Machines by C.V. Jones is non-negotiable. You need the PDF on your desktop.
If your library holds a physical copy, request ILL. Then, use a book scanner at 600 DPI in grayscale to create your own "new" PDF. Many university libraries now have dedicated book scanners (e.g., the CZUR ET series) that flatten pages automatically. The Unified Theory of Electrical Machines — CV
As of 2025, here is the definitive answer:
However, there is good news. Several university libraries have undertaken digitization projects. For example, the Internet Archive (archive.org) contains a borrowable scanned copy of the 1967 edition, though it is often restricted to one user at a time. Some academic institutions on the HathiTrust Digital Library provide full-text search access to affirmed students and faculty.
Therefore, a "new" PDF in the copyright-legal sense does not exist. But a "new" high-quality personal scan is what users are typically seeking.
Jones’ work relies heavily on two mathematical tools that were revolutionary at the time: No digital edition has been released by the
Why this is a game-changer: To control a motor today (using VFDs or servos), the microprocessor inside the drive is performing a Unified Theory calculation in real-time. Every time you use Field Oriented Control (FOC) in an EV or industrial robot, you are using C.V. Jones’ math.
The existing PDFs circulating on file-sharing sites (Library Genesis, Academia.edu, etc.) are typically scans from the 1960s/70s print. They suffer from:
Thus, users search for a "new" PDF—meaning a cleanly scanned, bookmarked, searchable, and high-resolution digital version, or ideally a re-typeset modern edition.
Due to copyright laws (which vary by country), simply linking to a free PDF is not feasible here. However, here is the 2025 roadmap for accessing the text: However, there is good news
Option 1: The Ethical Library Scan (Interlibrary Loan) Most public university libraries subscribe to digital reserves. Request the physical book via ILL. They will scan the chapter you need (usually Chapter 4: The General Equations) and email you a PDF for free. This is legal and yields a "new" high-quality scan.
Option 2: Academia and ResearchGate If you search the exact title on Academia.edu, you will often find uploaded slides or notes based on Jones, or occasionally the original chapters. Search specifically for "Jones unified theory dq0 transformation."
Option 3: The Print on Demand (Used Physical) While you want a PDF, the physical copy is superior for understanding the math. Use bookfinder.com. You will likely pay between $80 and $250. Buying the physical book and scanning it yourself creates the most pristine "new PDF" for your personal archive.
